IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 25 April 2011 (all times are UTC)
| 00:45 | dyllan (~dyllan@196-215-91-60.dynamic.isadsl.co.za) joined #ltsp. | |
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| 00:47 | <viks> fuse module is not showing in ltsp
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| 00:48 | <dyllan> hi all
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| 00:48 | I am having a problem with one of my thin clients, getting the ldm screen to show up, it PXE boots but then the screen stays blank. I am using this piece of hardware: http://www.devonit.com/_wp//wp-content/uploads/2010/10/TC5D-Dell.pdf
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| 00:49 | The only main difference between the thin client hardware that works and the one copied above that does not work is that non-working one had 2x DVI ports, do you think ltsp is getting confused about the dual DVI ports and therefore not able to bring up the ldm?
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| 00:49 | The thin client hardware that IS working: http://www.devonit.com/_wp//wp-content/uploads/2010/07/DIT_TC5Xc_SSheet-email.pdf
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| 00:49 | As you will see they both have the same Atom processor, memory and Graphics card.
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| 00:49 | any ideas? - thanks!
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| 00:51 | <viks> #eubuntu
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| 00:51 | #edubuntu
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| 00:52 | <dyllan> im there already ty
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| 00:53 | but ltsp should be able to shed some light as well
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| 00:53 | since its the technology that i am using.
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| 01:09 | <abeehc> dyllan: can you get output with ctrl+alt+f1 or whatever?
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| 01:11 | i'd be unlocking the chroot root account and poking around the client via console or ssh likely to find xorg log complaining about somthing
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| 01:11 | <dyllan> abeehc, hi :)
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| 01:11 | <viks> can anybody tell me how to boot client with ltsp local hardisk detection enable
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| 01:11 | <dyllan> abeehc, no nothing, but I added this to the kernel param and it brought up the ldm: acpi=off noacpi noapic nomodeset
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| 01:11 | strange!
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| 01:12 | <viks> when client will booot it shud see local harddisk
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| 01:12 | <dyllan> viks, have you read the ltsp documentation? There is a write-up about that in there if im not mistaken.
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| 01:15 | <viks> no give me the link .....i tried so many thing but it is not working
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| 01:15 | <dyllan> viks, http://sourceforge.net/apps/mediawiki/ltsp/index.php?title=Ltsp_LtspDocumentationUpstream
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| 01:16 | <viks> dyllan : this documentation i have red
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| 01:16 | but no use in my case
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| 01:16 | <abeehc> viks: what distro?
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| 01:17 | <dyllan> viks, ok, well i remember reading about it there.
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| 01:17 | <abeehc> what do you mean "see" local harddisk
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| 01:17 | <viks> yes
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| 01:17 | m using edubuntu
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| 01:17 | <dyllan> viks, in that documentation it explained how to use the local hardisk for swapping out or local apps of im not mistaken
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| 01:17 | <viks> i also tried ubuntu
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| 01:18 | <abeehc> the client boots and i think by default detects drives so I don't know what your aim is
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| 01:18 | maybe LOCALDEV=true in lts.conf
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| 01:18 | <viks> ya it is true
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| 01:18 | <abeehc> what makes you think the drive is not detected?
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| 01:19 | <viks> because it is not showing the local hardisk
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| 01:19 | <abeehc> where is it not showing
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| 01:20 | <viks> when client boots then i am checking whether it is showing local hardisk or not
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| 01:20 | <abeehc> how are you checking
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| 01:20 | <viks> i ran the command df -h
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| 01:20 | <abeehc> gotcha
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| 01:20 | <viks> it is showing server hardisk only but i want it shud show local hardisk
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| 01:21 | <abeehc> ok well you are probly running that command on the server?
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| 01:21 | <viks> yes
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| 01:21 | <abeehc> have you unlocked the client root account? I think you nede to start there
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| 01:21 | <viks> how to do that
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| 01:21 | let me know
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| 01:21 | i wiill follow u
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| 01:23 | <abeehc> i really only know the ubuntu documentation but this looks right: https://help.ubuntu.com/community/EdubuntuFAQ
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| 01:23 | How do I set the root password on the thin clients?
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| 01:23 | in that section
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| 01:24 | my impression is ubuntu stuff can even differ from edubuntu i don't know.. that looks like the same instructions though
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| 01:25 | <dyllan> abeehc, do you know why i would need to set those kernel params to get my 1 type of thin clients to boot? Weird! acpi=off noacpi noapic nomodeset
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| 01:25 | <abeehc> i wanna look at that pdf one sec
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| 01:25 | <dyllan> my graphics etc is much lower when setting those params.
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| 01:25 | ok
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| 01:25 | <abeehc> i would assume hardware not well supported
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| 01:26 | <dyllan> hmm yea, but they have the same graphics card, only the MB is different
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| 01:27 | even the cpu and memory are the same
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| 01:28 | <abeehc> i suppose the monitors are different?
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| 01:28 | <dyllan> no im using the same monitor
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| 01:28 | trial and error :)
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| 01:29 | <abeehc> i'm thinking the only parameter you need is nomodeset
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| 01:29 | not that it will improve anything
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| 01:29 | maybe worth narrowing down to that though
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| 01:29 | <dyllan> ok ill give it a go
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| 01:30 | ill try each one on its own and see if i can get the desired result.
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| 01:30 | <abeehc> then if you haven't unlcoedk the root account you should
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| 01:30 | <dyllan> yea I unlocked it the other day
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| 01:30 | <abeehc> probly just start with nomodeset alone i think they'll just work
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| 01:30 | <dyllan> i see it complaining about the graphics card when i set those parameters.
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| 01:31 | <abeehc> ok pastebins of lspci and Xorg.log would be cool
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| 01:31 | <dyllan> ok give me a sec and ill pull that info for you
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| 01:31 | <abeehc> are you certain when you don't get video output the client hasn't booted at all?
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| 01:31 | like ctrl+alt+f1 doesn't result in anything? can you ping the client at that point maybe?
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| 01:32 | likely possible to fix the problem at run time if the machine's actually booted with no extra parameters
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| 01:33 | <dyllan> not able to switch to different console no. The keyboard even freezes. I can ping the thin client tho.
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| 01:33 | <abeehc> i'd consider installing ssh in the chroot
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| 01:34 | <dyllan> I lied! cant ping it
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| 01:34 | just setting: nomodeset doesnt bring up ldm wil try with others
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| 01:36 | <abeehc> that sounds bad i'd be looking for bug reports against drivers or something; i guess you can't actually boot a livecd locally or anything
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| 01:39 | maybe firmware updates for the client exist if thats how they work
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| 01:44 | <dyllan> abeehc, i can boot from a usb loaded with ubuntu livecd no problem
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| 01:44 | weird hey
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| 01:46 | <dyllan> abeehc, the only thing that works is to use the param acpi=off everything else does nothing
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| 01:48 | I get an INVALID CARD NUMBER just before ldm loads though
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| 01:53 | <abeehc> is your chroot on a recent kernel or otherwise?
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| 01:54 | <dyllan> in chrooted now, its 2.6.38-8 which i believe is the latest?
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| 01:54 | my graphics card is : Intel 945GME Express
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| 01:55 | The exact same as the other thin client that works beautifully, just again the motherboards are different :/
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| 01:55 | <alkisg> I think acpi=off is related to BIOS problems
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| 01:55 | Try upgrading your BIOS firmware. Or use some of the other acpi=xxx variants, I think there are some compatibility modes there
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| 01:56 | <dyllan> yea.. . that would make sense, such a pity, ill try upgrading the BIOS if possible!
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| 01:56 | alkisg, where could i find those compatibility modes? acpi=xxx
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| 01:56 | <alkisg> http://www.kernel.org/doc/Documentation/kernel-parameters.txt
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| 01:56 | <dyllan> thanks
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| 01:57 | <alkisg> The weird thing is that it boots normally but not with LTSP
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| 01:59 | <dyllan> yea
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| 02:01 | other problem is that BIOS upgrades for American Megatrend are mostly .exe files even to create a bootdisk you need to download an .exe file to create the bootdisk, this is going to be interesting since i dont own a windows machine :/
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| 06:11 | <khussein78> I was opened a discussion before , but now I installed LTSP from alternate CD for ubuntu
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| 06:12 | now i am facing new problem , ARP timeout TFTP cannot open connection
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| 06:12 | where to fix this issue ,
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| 06:15 | <alkisg> https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP
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| 07:54 | <andygraybeal> morning everyone
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| 12:45 | <jsass> hey all
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| 12:45 | I am having a problem with my nbd server apparently
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| 12:45 | Clients are not able to log in correctly at LDM, and /var/log/syslog shows nbd9: unknown partition table
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| 12:46 | nbd9: nbd_disconnect
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| 12:46 | The server was woring properly, until I rebooted
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| 12:47 | Nick change: jsass -> _UsUrPeR_ | |
| 12:47 | <_UsUrPeR_> whoops
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| 12:49 | <_UsUrPeR_> anyway, /etc/nbd-server has the normal [generic] and [export] lines
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| 12:49 | restarting nbd-server does not show any errors
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| 12:53 | <vagrantc> LTSP doesn't typically use nbd-server's init scripts or config files
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| 12:53 | it's normally configured in /etc/inetd.conf
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| 12:59 | <_UsUrPeR_> ok, got it
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| 12:59 | I am testing this to be installed on another network
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| 12:59 | <vagrantc> though some recent developments in NBD might allow that to change in the future
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| 12:59 | <_UsUrPeR_> If I apply a gateway to the interface, when the gateway does not exist, it causes that error
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| 13:00 | vagrantc, ^^
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| 13:00 | I removed the gateway, and that fixed it right up
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| 13:00 | <vagrantc> you should typically only have one gateway per computer
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| 13:01 | <_UsUrPeR_> vagrantc: yeah, this is on a different subnet and everything
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| 13:01 | like I said, I was just testing to make sure everything was working correctly prior to installing it at a facility with a different subnet (10, network instead of 192.168.1. network)
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| 13:02 | <_UsUrPeR_> why would the gateway, existent or not, have any effect on the nbd server?
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| 13:03 | I mean, I see that it puts a route in, which is visible with route -n
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| 13:03 | <vagrantc> well, having multiple default routes, depending on what order they land, might send the response out the wrong interface
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| 13:03 | <_UsUrPeR_> vagrantc: but it seems like that really should not be to the server's detriment
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| 13:04 | vagrantc: suppose the server has only one interface, and the clients are assigned their IP addresses from an external DHCP server
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| 13:04 | (which is how this is configured)
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| 13:10 | vagrantc: so that I understand this properly: because using a gateway creates a default route, and that gateway IP address does not yet exist, it will cause issues. Am I formulating this reasoning properly?
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| 13:11 | <vagrantc> that it was a single nic setup might throw me off a bit
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| 13:15 | <_UsUrPeR_> vagrantc: one moment, I'm pastebinning something
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| 13:16 | <_UsUrPeR_> vagrantc: here's a pastebin of route -n -- http://pastebin.com/VpsyinPG
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| 13:17 | taking a look at that second route (destination 0.0.0.0), that looks like anything passing anywhere will first have to pass through the gateway. Is that correct in reading this?
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| 13:18 | as a secondary question, what functions would remove the /etc/nbd-server/config file?
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| 13:18 | I am thinking that it would have to be a removal of an LTSP package
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| 13:19 | <alkisg> There's no /etc/nbd-server/config by default, so no package "removed" it
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| 13:20 | <_UsUrPeR_> hmm
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| 13:20 | where does nbd-server receive it's parameters from?
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| 13:20 | alkisg, ^^
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| 13:20 | <alkisg> /etc/inetd.conf
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| 13:20 | <_UsUrPeR_> gotcha
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| 13:20 | <alkisg> There's nbdrootd there, which is a shell script
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| 13:21 | Inside nbdrootd you'll see the exact nbd-server call, with the appropriate parameters
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| 13:21 | $ grep nbd-server /usr/sbin/nbdrootd
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| 13:21 | PATH=/usr/bin:/bin:$PATH exec nbd-server 0 $1 -r -C /dev/null $nbd_timeout > /dev/null 2>&1
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| 13:21 | <_UsUrPeR_> yeah, I see that in inetd.conf
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| 13:21 | <alkisg> That "-C /dev/null" means "don't use a configuration file"
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| 13:22 | <_UsUrPeR_> ok, I gotcha
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| 13:22 | <alkisg> _UsUrPeR_: also, that nbd9 disconnection is normal, it's just a way to check for a newer chroot image, in order for the clients to automatically reboot
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| 13:24 | <vagrantc> "normal" heh.
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| 13:24 | <_UsUrPeR_> :)
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| 13:24 | * alkisg doesn't like that method either :) | |
| 13:24 | <_UsUrPeR_> *WARNING CATASTROPHIC FAILURE* <--- totally normal ;)
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| 13:24 | <alkisg> But ...it works :)
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| 13:27 | <_UsUrPeR_> ok, so consider this: *if* the nbd-server *requires* /etc/nbd-server/config to operate properly, what is missing?
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| 13:28 | <alkisg> It doesn't require it
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| 13:29 | <vagrantc> it only needs that in order to run the nbd-server initscript (or whatever it is ubuntu uses)
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| 13:29 | ubuntu uses an alternate method to start nbd-server (through inetd)
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| 13:29 | <_UsUrPeR_> I am testing something to qualify before I report
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| 13:31 | <alkisg> _UsUrPeR_: if you see ldm, then nbd is working properly, don't try to troubleshoot it :)
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| 13:31 | If nbd wasn't working, you wouldn't get past the initramfs stage, you wouldn't see "Starting LTSP client.."
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| 13:33 | <_UsUrPeR_> alkisg: yeah, this is actually quite a custom setup here. LDM exists, but is bypassed with an LDM_AUTOLOGIN = TRUE . I am pretty sure this doesn't totally stop LDM from working though
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| 13:34 | <alkisg> _UsUrPeR_: sure, but in any case, nbd is the whole client disk. If it wasn't working, you wouldn't get far...
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| 13:35 | <_UsUrPeR_> alkisg: That makes sense :)
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| 13:38 | alkisg: ok, so I am looking over server logs
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| 13:38 | if xinetd was installed, that would totally garf up everything pertaining to this wouldn't it?
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| 13:39 | <alkisg> Yes
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| 13:39 | <_UsUrPeR_> in that case, problem solved
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| 13:39 | <alkisg> Usually openbsd-inetd is used, if someone wants to use xinetd he needs to configure it manually
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| 13:39 | <_UsUrPeR_> does xinetd get installed with samba?
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| 13:40 | <vagrantc> we should really add some configs for xinetd
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| 13:40 | <alkisg> But if you're seeing "Starting LTSP client...", then xinetd/nbd etc are not your problem
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| 13:40 | <vagrantc> it's really easy.
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| 13:57 | <Dlbass> Greetings, can someone help me out? We are trying to run ltsp with edubuntu, use one user called student. We can only run one instance of firefox at a time. What are we doing wrong? Thanks!
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| 13:58 | <alkisg> Dlbass: you're using the same account for many terminals?
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| 13:58 | <Dlbass> Yes, if that is doable?
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| 13:59 | <alkisg> That's not good practice, make at least 1 user per workstation, student1, student2 etc
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| 13:59 | Except from the firefox problem that you saw, there are other problems too, with gnome etc etc
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| 14:00 | Lots of apps are not designed to be run simultaneously by different sessions of the same user, it's not an LTSP limitation
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| 14:00 | <Dlbass> Oh ok. Do you mind if I ask how you would recommend we set up a server that would allow connections from an entire campus. Would it be best to label each machine with a user name for it and only it to use?
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| 14:01 | <Dlbass> Please excuse my slowness, I'm using my phone.
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| 14:01 | <_UsUrPeR_> hey guys, just want to say thanks for the help
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| 14:01 | <vagrantc> Dlbass: how many users?
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| 14:01 | <Dlbass> 30 or so
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| 14:02 | <_UsUrPeR_> finding xinetd was a big "oh sonofa---"
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| 14:02 | anyway, later
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| 14:02 | <vagrantc> Dlbass: there's an LDM_GUESTLOGIN feature, which will automatically select a username based on ip address of the thin client ...
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| 14:03 | <alkisg> Dlbass: 3 alternative options for user accounts are: (1) one account per PC, (2) one account per student, and (3) one account for each "team" of students, if more than 1 students are sitting on the same PC on each class (e.g. here we have 2-3 students per pc). Which of those would better fit you?
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| 14:03 | <vagrantc> or LDM_AUTOLOGIN, which does the same thing, but automatically logs them in, too
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| 14:05 | <Dlbass> Awesome, that might be our solution. We are looking to have a central image that can be kept up to date without having to touch each computer. Other than that we are flexible. Auto login sounds great if that's usable.
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| 14:05 | We have one student per computer.
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| 14:06 | <alkisg> Do you want them to have their own usernames/passwords, desktops, documents etc?
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| 14:07 | <Dlbass> Not really, essentially just a web browser.
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| 14:07 | <alkisg> Then what vagrantc said should suit you fine
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| 14:07 | <Dlbass> This is for k through 5.
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| 14:08 | <vagrantc> the LDM_GUESTLOGIN presents a button to click, and LDM_AUTOLOGIN just logs right in as soon as it's turned on.
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| 14:08 | well, as soon as it gets to the login manager
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| 14:08 | <Dlbass> Awesome thanks guys, we will try that out!
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| 14:09 | <vagrantc> i use ssh keys, so that i can have all the accounts be passwordless, and just learned how to force them to particular IP addresses
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| 14:09 | <Dlbass> I'm supposing I will find some documentation for that with a google search, right?
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| 14:09 | <vagrantc> and automatically create homdirs on login
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| 14:09 | <alkisg> See the irc topic for docs
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| 14:09 | <Dlbass> Awesome
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| 14:09 | How do I see the topic again, can't scroll that far up
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| 14:10 | <vagrantc> maybe /topic ... depends on your client
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| 14:12 | <Dlbass> Whoo that was it!
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| 14:14 | So I will still need am account for each student, and one specified to each ip?
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| 14:16 | <vagrantc> well, if each student has their own username/password, you only need one account per student.
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| 14:16 | but if you want to do guestlogin/autologin, you just need one per ip address of thin client
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| 14:17 | <Dlbass> Ok, that makes sense!
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| 14:17 | Thank you so much guys!
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| 14:46 | dlbass (cc1d4484@gateway/web/freenode/ip.204.29.68.132) joined #ltsp. | |
| 14:46 | <dlbass> Hey guys, I'm back with more questions.
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| 14:46 | You told me about LDM_AUTOLOGIN, and I read about it in teh documentation. I have not yet been able to get it to work.
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| 14:47 | I did not have an lts.conf in the directory the docs said it would be so I made one.
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| 14:47 | <vagrantc> in /var/lib/tftpboot/ltsp/i386/lts.conf?
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| 14:47 | <dlbass> precisely.
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| 14:48 | <vagrantc> [default]
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| 14:48 | LDM_AUTOLOGIN=true
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| 14:48 | should get you started
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| 14:48 | <dlbass> i didnt put default!
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| 14:48 | <vagrantc> that'll break it
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| 14:48 | <dlbass> I did it like... [macaddress]
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| 14:48 | LDM_AUTOLOGIN=TRUE
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| 14:49 | LDM_USERNAME=student1
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| 14:49 | <vagrantc> dlbass: you still need a default section, i think
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| 14:49 | <dlbass> LDM_PASSWORD=student
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| 14:49 | <vagrantc> the problem with that sort of a setup is the students could change the password on you
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| 14:49 | but get the basics working first :)
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| 14:49 | <dlbass> Oh, that would not be good.
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| 14:50 | Yeah, I'm going to try adding the default section. Would it be [default]
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| 14:50 | <vagrantc> dlbass: it'll autogenerate a username if you don't specify LDM_USERNAME
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| 14:50 | <dlbass> LDM_AUTOLOGIN=true
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| 14:50 | then below that [macadress] with the password and username?
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| 14:50 | <vagrantc> that should work
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| 14:50 | <dlbass> oh cool
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| 14:51 | <vagrantc> LDM_GUESTLOGIN is a little easier to troubleshoot, if it doesn't work ... because it actually presents a login screen
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| 14:52 | <dlbass> if I used guestlogin, how would that work with say 30 students using the computers at the same time? As in how would they login?
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| 14:53 | <vagrantc> well, i'm just talking about while you troubleshoot
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| 14:53 | <dlbass> oh ok, so I am still best off with LDM_AUTOLOGIN?
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| 14:53 | <vagrantc> guestlogin presents a login screen with a button "login as guest"
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| 14:54 | autologin makes them always logged in ... so if you're only using 10 out of 30 computers, it's using all 30 running sessions
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| 14:55 | that's one disadvantage ... whereas guestlogin waits until they actually need it
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| 14:55 | <dlbass> can there be 30 guests at once?
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| 14:55 | <vagrantc> as long as they're all got different usernames
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| 14:56 | <dlbass> Which I would manually create in the user manager?
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| 14:57 | <vagrantc> user manager doesn't care about autologin, guestlogin or manual login
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| 14:57 | they're just accounts
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| 14:58 | <vagrantc> dlbass: before you get into that, though, just create one user and use the LDM_USERNAME, LDM_PASSWORD and get it to work.
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| 15:00 | <dlbass> and those are to be defined per mac address, after I have already set autologin=true under default, am I correct?
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| 15:01 | <vagrantc> sure
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| 15:02 | dlbass: to make it even simpler, don't bother with mac address ... just use default
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| 15:02 | dlbass: just to get one working
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| 15:02 | <dlbass> thank you so much, sorry to be an ignorant fool in over my head!
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| 15:02 | <vagrantc> thanks for getting LTSP into the minds of the young :)
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| 15:05 | <dlbass> Oh how we love linux! I got it working!
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| 15:05 | with your step by step guidance of course.
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| 15:07 | <vagrantc> dlbass: ok, so now open up a terminal and type: echo $LTSP_CLIENT_HOSTNAME
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| 15:07 | that's the name it would use if you didn't specify LDM_USERNAME
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| 15:07 | <andygraybeal> dlbass, everyone starts somewhere! i'm always that person!
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| 15:08 | dlbass, i think it's cool that yuor digging it!
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| 15:08 | :)
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| 15:08 | i'm like the ubernewb
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| 15:08 | <dlbass> lol, that's how I am, gotta keep finding soemthing new!
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| 15:10 | vagrantc, so if I jsut had [default] LDM_AUTOLOGIN=TRUE, it should use say "ltsp34" as its name and would ignore the password, and all 30 machines would be on seperate users?
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| 15:10 | <vagrantc> dlbass: each machine would generate a name ltspXXX and use that for the name and password
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| 15:10 | but then you can get tricky and use ssh keys :)
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| 15:11 | to have disabled passwords
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| 15:11 | and get really tricky and create the accounts without homedirs :)
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| 15:11 | <dlbass> lol, how tricky?
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| 15:13 | by using [hostname] and establishing teo user accounts I was able to autologin two machines... now I want to get it to automatically do it all, so i should remove everything but [default] ldm_autologin=true
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| 15:13 | <vagrantc> you generate an ssh key with ssh-keygen, configure the ltsp chroot to use that key by dropping it in the right place, and then configure the keys on your server for each of those accounts
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| 15:13 | <andygraybeal> i've wondered how i can login with a magnetic swipe card.. with a key and username on the card or something. hook up a usb magnetic strip reader
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| 15:14 | or something similiar, maybe not magnetic cards, but like smartcards or similiar
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| 15:14 | <vagrantc> sudo mkdir -p /opt/ltsp/i386/root/.ssh ; sudo chown og-rwx /opt/ltsp/i386/root/.ssh ; sudo ssh-keygen -t rsa -N '' -f /opt/ltsp/i386/root/.ssh/id_rsa
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| 15:14 | <dlbass> would be neat, especially if the same card unlocked your door and was your lunchticket
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| 15:15 | <vagrantc> that creates the key and puts in a place where they'll get used
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| 15:15 | <dlbass> I am saving that in a doc on my desktop :P
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| 15:17 | vagrantc, when I took away the hostname specific account info, i get failed to connect to nbd server on one, and failed due to unkown user id on the other
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| 15:17 | <vagrantc> then you have two options of what to do with the id_rsa.pub file ... you can: sudo mkdir /home/USERNAME/.ssh/ ; sudo cp /opt/ltsp/i386/root/.ssh/id_rsa.pub /home/USERNAME/.ssh/authorized_keys ; sudo chown -R username:usergroup /home/USERNAME/.ssh ; sudo chmod og-rwx /home/USERNAME/.ssh
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| 15:18 | dlbass: well, you have to create all the accounts that they're trying to log in ass ... not sure on the nbd server error, though.
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| 15:18 | lon in as.
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| 15:18 | heh
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| 15:18 | * vagrantc fails with the keyboard | |
| 15:18 | <dlbass> oh! so i need to generate the ltsp34 and ltsp 35.... and set that as the password as well?
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| 15:18 | <vagrantc> dlbass: that's the easy way
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| 15:19 | dlbass: it has the disadvantage of people being able to change their password, of course.
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| 15:19 | <dlbass> ok, im getting closer to understanding!
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| 15:19 | im following your ssh method
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| 15:20 | <vagrantc> dlbass: setting up the ssh keys would allow the autologin to work without passwords
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| 15:20 | <dlbass> that sounds very nice.
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| 15:20 | <vagrantc> and without a password, the user can't accidentally or maliciously change their password
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| 15:20 | <dlbass> which is great
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| 15:21 | <vagrantc> you'll also have to be sure to disable screensaver locking when they don't have a password :)
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| 15:21 | <dlbass> oh yes, that would be bad..
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| 15:21 | <vagrantc> i just went over all this stuff, so it's a good refresher :)
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| 15:22 | <dlbass> one question... can you not have a password at all, and not even do the ssh, or is it one or the other?
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| 15:22 | <vagrantc> LTSP's display manager, LDM, uses ssh for authentication
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| 15:23 | <vagrantc> you can connect with ssh and a password, or ssh with an ssh key
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| 15:23 | <dlbass> ok i follow.
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| 15:24 | when I create my user account called ltsp34, and it asks for a password, I tell it...?
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| 15:25 | <vagrantc> i create accounts with adduser --disabled-password
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| 15:25 | from the commandline
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| 15:26 | <dlbass> so adduser --diabled-password ltsp34
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| 15:26 | <vagrantc> yeah, and to save you even more typing ...
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| 15:27 | <dlbass> "mysteriously, that user already exists!!!"
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| 15:27 | <vagrantc> adduser --disabled-password --gecos ,,, $USERNAME
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| 15:27 | ah, yes.
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| 15:27 | <dlbass> ok what is this witchcraft at the end ,,, $USERNAME?
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| 15:27 | <vagrantc> you could delete it and recreate it, or simply lock it's password: passwd -l $USERNAME
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| 15:27 | that's a variable :)
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| 15:27 | so what i actually do is:
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| 15:28 | i use a for loop to create all the users in the dhcp range
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| 15:29 | hmm...
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| 15:30 | <dlbass> was I supposed to say WHAT?!, I thought you were still typing
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| 15:30 | <vagrantc> well, essentially: for u in ltsp34 ltsp35 ltsp36 ; do adduser --disabled-password --gecos ,,, $u ; done
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| 15:30 | <dlbass> ah
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| 15:30 | <vagrantc> the script i actually use gets into some more complicated stuff
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| 15:30 | but the above line will create 3 accounts
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| 15:31 | <dlbass> is that the ,,, ?
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| 15:31 | <vagrantc> that just prevents adduser from asking you the user's full name, room number, and other miscelaneous stuff you probably don't care about, since they're generic users
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| 15:32 | <vagrantc> for a in $(seq 100 254) ; do u=ltsp$a adduser --disabled-password --gecos ,,, $u ; done
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| 15:32 | <dlbass> it gave me "only one or two names allowed?
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| 15:32 | <vagrantc> that creates ltsp100 through ltsp254, for example
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| 15:32 | oops
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| 15:32 | for a in $(seq 100 254) ; do u=ltsp$a ; adduser --disabled-password --gecos ,,, $u ; done
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| 15:33 | do you know what dhcp range your computers get?
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| 15:33 | <dlbass> the defualt from ltsp
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| 15:33 | ive seen 254 and ive seen 36 and ive seen 34
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| 15:34 | <vagrantc> grep range /etc/ltsp/dhcpd.conf
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| 15:34 | <dlbass> 20-250
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| 15:34 | <vagrantc> got it
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| 15:35 | <dlbass> so i havent seen 254 lol
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| 15:35 | <vagrantc> sure
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| 15:35 | so you'd want $(seq 20 250) in the for loop
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| 15:35 | but maybe we're in over our heads, now :)
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| 15:35 | <dlbass> please go on if you dont mind
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| 15:36 | im soaking up all i can
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| 15:36 | <vagrantc> the other thing i do is configure it to only create homedirs on login
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| 15:36 | in which case, you'd do:
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| 15:36 | for a in $(seq 100 254) ; do u=ltsp$a ; adduser --disabled-password --no-create-home --gecos ,,, $u ; done
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| 15:37 | and then edit /etc/pam.d/common-auth:
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| 15:37 | session required pam_mkhomedir.so silent
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| 15:37 | <dlbass> so i am literally supposed to enter that exact strand character for character
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| 15:37 | <vagrantc> that's what cutting and pasting are for :)
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| 15:37 | and i'd change the seq numbers, since you've got different numbers
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| 15:38 | <dlbass> well I have to type it going from this machine to my virtual server because im an idiot, but I was jsut confused, now we are getting somewhere
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| 15:38 | <vagrantc> but the editing /etc/pam.d/common-auth ... that's a configuration file you'd want to edit on a text editor
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| 15:38 | <dlbass> i use nano usually
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| 15:38 | if that is acceptable
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| 15:39 | <vagrantc> whatever tickles your fancy :)
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| 15:39 | just wanted to make sure you understood it wasn't a commandline thing, like the for loop
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| 15:40 | with pam_mkhomedir enabled, then you don't have to have a bunch of stale homedirs from machines that will never even log in
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| 15:40 | <dlbass> oh crap, i forgot sudo now it is spamming YOU CANT DO THAT!!!
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| 15:41 | <vagrantc> no worries
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| 15:41 | <dlbass> bad syntax error near do?
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| 15:42 | <vagrantc> for a in $(seq 20 250) ; do u=ltsp$a ; echo adduser --disabled-password --no-create-home --gecos ,,, $u ; done
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| 15:42 | try that one?
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| 15:42 | it won't create, but it should spit out the lines
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| 15:43 | might be an issue with the way sudo's interacting ...
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| 15:43 | <dlbass> same effect
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| 15:43 | <vagrantc> for a in $(seq 20 250) ; do u=ltsp$a ; echo sudo adduser --disabled-password --no-create-home --gecos ,,, $u ; done
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| 15:43 | hrm.
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| 15:43 | <dlbass> so i will move sudo over
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| 15:43 | it worked
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| 15:44 | so now remove echo
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| 15:44 | <vagrantc> you might get errors on the accounts already created
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| 15:44 | <dlbass> excellent it is working
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| 15:44 | that is so awesome!
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| 15:45 | <vagrantc> now you've got to configure your ssh keys :)
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| 15:45 | <dlbass> about 80 more accounts to go
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| 15:46 | all accounts created!
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| 15:46 | i had used deluser to remove teh others
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| 15:46 | fail type
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| 15:46 | lol
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| 15:47 | so now time for this sudo mkdir -p /opt/ltsp/i386/root/.ssh ; sudo chown og-rwx /opt/ltsp/i386/root/.ssh ; sudo ssh-keygen -t rsa -N '' -f /opt/ltsp/i386/root/.ssh/id_rsa?
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| 15:48 | <vagrantc> for a in $(seq 20 250) ; do u=ltsp$a ; sudo cp /opt/ltsp/i386/root/.ssh/id_rsa.pub /var/lib/ssh_authorized_keys/$u ; sudo chown root:$u /var/lib/ssh_authorized_keys/$u ; sudo chmod 0640 /var/lib/ssh_authorized_keys/$u ; done
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| 15:48 | ah yes, do that first
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| 15:49 | oh, mkdir -p /var/lib/ssh_authorized_keys
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| 15:50 | <dlbass> so not the line i pasted above?
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| 15:50 | or that plus the one you jsut did
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| 15:51 | <vagrantc> dlbass: sorry, i got out of order. first create the key with the line you pasted above, yes.
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| 15:51 | dlbass: then mkdir -p ...
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| 15:51 | dlbass: and then the for a in $(seq 20 ...
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| 15:52 | step by step, this gets fancier :)
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| 15:52 | <dlbass> lol, I am having fun
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| 15:54 | <vagrantc> there are even fancier ways to do some of this stuff with LDAP and such, but i haven't gotten there yet.
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| 15:56 | <dlbass> it says this doesn't exist, /opt/ltsp/i386/root/.ssh/id_rsa.pub
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| 15:58 | <vagrantc> sudo ls /opt/ltsp/i386/root/.ssh/
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| 15:58 | dlbass: you ran the one with ssh-keygen ?
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| 15:59 | <dlbass> id_rsa? and id_rsa?.pub
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| 15:59 | <vagrantc> oh, fun.
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| 15:59 | <dlbass> crap i see what i did
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| 15:59 | i asked you a question, and typed the ? too
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| 15:59 | lol
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| 15:59 | <vagrantc> sudo mv /opt/ltsp/i386/root/.ssh/id_rsa? /opt/ltsp/i386/root/id_rsa
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| 15:59 | <dlbass> i apologize for that
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| 15:59 | <vagrantc> sudo mv /opt/ltsp/i386/root/.ssh/id_rsa?.pub /opt/ltsp/i386/root/id_rsa.pub
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| 16:00 | :)
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| 16:00 | it's fixable
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| 16:00 | there are worse characters to put into filenames ...
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| 16:00 | <dlbass> does it need to be in /.ssh or no
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| 16:01 | <vagrantc> oh, yes, sorry for the typo
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| 16:01 | <dlbass> ok, no problem at all
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| 16:01 | done
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| 16:01 | now rerunning the command above
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| 16:02 | no output, so I guess it worked?
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| 16:03 | this is pretty darn fancy
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| 16:03 | <vagrantc> ls /var/lib/ssh_authorized_keys/
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| 16:03 | should see one entry per user
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| 16:03 | ls -l /var/lib/ssh_authorized_keys/
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| 16:04 | <dlbass> yep
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| 16:04 | there is one for each
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| 16:05 | <vagrantc> ok. next, configure sshd
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| 16:05 | edit /etc/ssh/sshd_config
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| 16:05 | add a line:
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| 16:05 | AuthorizedKeysFile2 /var/lib/ssh_authorized_keys/%u
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| 16:06 | <dlbass> does it matter under what
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| 16:06 | <vagrantc> ?
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| 16:06 | <dlbass> just put it at the bottom?
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| 16:06 | <vagrantc> ah, sure
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| 16:07 | dlbass: there's also probably a commented line for AuthorizedKeysFile that you could put it under
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| 16:07 | <dlbass> save and close?
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| 16:07 | <vagrantc> sure.
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| 16:07 | and restart ssh: sudo invoke-rc.d ssh restart
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| 16:08 | then run: sudo ltsp-update-image
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| 16:08 | you're using ubuntu, right?
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| 16:08 | <dlbass> edubuntu, same thing thought, right?
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| 16:08 | <vagrantc> close enough :)
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| 16:08 | <dlbass> though not thought
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| 16:08 | lol
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| 16:09 | <vagrantc> after ltsp-update-image, you should be able to reboot a thin client and autologin
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| 16:09 | <dlbass> no need to reboot the server or anything?
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| 16:11 | noooooooooooooooooooooooo, failed do to unknown user id...
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| 16:13 | all of the users show up in the user manager
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| 16:16 | lts.conf looks like
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| 16:16 | [default]
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| 16:16 | LDM_AUTOLOGIN=TRUE
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| 16:17 | <vagrantc> dlbass: sudo ssh -i /opt/ltsp/i386/root/.ssh/id_rsa ltsp20@localhost
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| 16:18 | test and see if the key is recognized
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| 16:19 | <dlbass> authenticity of 'localhost (::1)' cant be established
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| 16:19 | but it offers to cintune
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| 16:19 | <vagrantc> you'll probably get a prompt about unknown host key ... yeah
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| 16:19 | <dlbass> continue, and also shwos the key
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| 16:19 | <vagrantc> should be fine.
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| 16:20 | you can verify the key by checking your local host key, if you really want:
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| 16:20 | <dlbass> i continued, and it asks for password
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| 16:20 | <vagrantc> hrm.
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| 16:20 | <dlbass> for ltsp20@localhost
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| 16:20 | <vagrantc> dlbass: you restarted ssh?
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| 16:20 | ls -l /var/lib/ssh_authorized_keys/ltsp20
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| 16:21 | <dlbass> I did
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| 16:21 | <vagrantc> what version of edubuntu?
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| 16:22 | <dlbass> 10.10
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| 16:22 | that command shows one directory
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| 16:22 | <vagrantc> one file?
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| 16:22 | <dlbass> possibly
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| 16:22 | i wouldnt know the difference lol
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| 16:23 | <vagrantc> could you cut and paste it?
| |
| 16:23 | * vagrantc has to go fairly soonish | |
| 16:23 | <dlbass> i can type it slowly.
| |
| 16:23 | ah well if you have to go, lets call it quits for today, I was supposed to leave over an hour ago
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| 16:23 | but im having fun
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| 16:24 | <vagrantc> oh.
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| 16:24 | worst case, delete all the accounts, set them up with username/password the same, and can fix the ssh keys later
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| 16:24 | i.e. ltsp20/ltsp20, ltsp21/ltsp21 ... ltsp250
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| 16:24 | <dlbass> -rw-r--r-- 1 root ltsp20 407 2011-04-25 18:01
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| 16:24 | <vagrantc> dlbass: aha
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| 16:25 | <dlbass> it syas more...
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| 16:25 | if you need it
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| 16:25 | <vagrantc> dlbass: sudo chmod o-rwx /var/lib/ssh_authorized_keys/*
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| 16:26 | they should all be:
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| 16:26 | -rw-r-----
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| 16:26 | and then try again
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| 16:26 | hopefully that's it
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| 16:27 | <dlbass> says no such file or directory.. what? lemm try again
| |
| 16:27 | it doesnt like the asterisk
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| 16:27 | will it work if I dont use it
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| 16:28 | <vagrantc> dlbass: sudo chmod -R o-rwx /var/lib/ssh_authorized_keys/
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| 16:28 | add the recursive bit, then
| |
| 16:28 | the -R
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| 16:28 | <dlbass> woohoo
| |
| 16:28 | now try booting again?
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| 16:28 | <vagrantc> sure
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| 16:28 | <dlbass> -R has been my friend in times past, used him to get my joomla going on my home server
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| 16:29 | stupid server thought it needed to be all secure and stuff, but i used -R to make it all public so my addons would work lol
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| 16:29 | no it is still broken with a new error
| |
| 16:29 | <vagrantc> that doesn't sound good :P
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| 16:30 | <dlbass> it goes away so fast
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| 16:30 | plymoth something killed by SEGV signal
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| 16:30 | <vagrantc> odd
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| 16:30 | <dlbass> restart ssh again?
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| 16:31 | <vagrantc> i'm not too familiar with *ubuntu
| |
| 16:31 | <dlbass> what is your favorite?
| |
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| 16:31 | <vagrantc> dlbass: sudo ssh -i /opt/ltsp/i386/root/.ssh/id_rsa ltsp20@localhost
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| 16:31 | try that again
| |
| 16:32 | * vagrantc works on debian | |
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| 16:32 | <dlbass> went straight to asking the password
| |
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| 16:33 | * vagrantc wonders if ubuntu doesnt' respect AuthorizedKeysFile2 | |
| 16:33 | <dlbass> should change it to not have teh 2?
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| 16:34 | <vagrantc> it's worth testing ... it'll break expectations about where the ssh keys are
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| 16:34 | <dlbass> oh.
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| 16:34 | <vagrantc> although if this is all you're doing, that should be fine
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| 16:34 | <dlbass> are you going to be willing to test some more tomorrow?
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| 16:34 | <vagrantc> probably won't have much time till friday
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| 16:35 | can sometimes get a little in over the week
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| 16:35 | i know this method works with ubuntu's lucid (10.04) and debian's squeeze release
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| 16:35 | but there might be some gotcha
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| 16:35 | <dlbass> it shoudl still work if it works on 10.04
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| 16:36 | ive surely entered something in wrong
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| 16:36 | <vagrantc> it's possible
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| 16:36 | computers are pretty fussy with details :)
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| 16:36 | <dlbass> more like porbable
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| 16:36 | probable lol
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| 16:37 | maybe my boos can help me go over what you have taught me today and we can find what I did wrong, and If not I shall see you friday! Thank you so much for your help!!!!!!!
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| 16:38 | <vagrantc> good luck!
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| 16:38 | <dlbass> cya later guys
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| 16:38 | <vagrantc> dlbass: one more thing
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| 16:38 | <dlbass> im here
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| 16:38 | <vagrantc> dlbass: sudo chmod o+rx /var/lib/ssh_authorized_keys
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| 16:38 | the sshd might need read access to the dir or something stupid like that
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| 16:39 | it's probably some sort of ssh being fussy about the permissions of the users.
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| 16:39 | <dlbass> rx or rwx
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| 16:39 | <vagrantc> just rx
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| 16:39 | <dlbass> ok
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| 16:39 | <vagrantc> rwx would be dangerous ... allowing anyone to write to anyone else's login keys :)
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| 16:39 | <dlbass> lol oh yes
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| 16:39 | im letting my novice show
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| 16:40 | <vagrantc> so it's good that ssh is particular about permissions... but that's probably what's biting you
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| 16:40 | <dlbass> booting a computer
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| 16:40 | failed due to unkown user id (process: 304)
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| 16:40 | GAH!
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| 16:41 | getpwuid_r() is alos in there
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| 16:41 | <vagrantc> there are also other clever folks in here ... though they might not understand exactly what i was trying to set up.
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| 16:41 | i ought to document it
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| 16:42 | dlbass: you did add the pam_mkhomedir stuff?
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| 16:42 | <dlbass> (process:304): GLib-WARNING **: getpwuid_r(): failed due to an unkown user id (0)
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| 16:42 | umm
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| 16:43 | i dont think so
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| 16:43 | i cant find that line
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| 16:43 | <vagrantc> in /etc/pam.d/common-auth:
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| 16:43 | session required pam_mkhomedir.so silent
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| 16:44 | <dlbass> is that supposed to be a blank file?
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| 16:45 | <vagrantc> don't know on ubuntu ... there's a lot of comments on debian
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| 16:46 | <dlbass> i typed in sudo nano /etc/pam.d/common-auth:
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| 16:46 | is that right?
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| 16:46 | <vagrantc> no ":"
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| 16:46 | <dlbass> ah thats better!
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| 16:46 | sorry
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| 16:46 | <vagrantc> sometimes the english and the code get confusing :)
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| 16:47 | <dlbass> ok did that
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| 16:49 | <dlbass> OMG IT WORKDED!
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| 16:49 | !!
| |
| 16:49 | !
| |
| 16:49 | Last message repeated 2 time(s). | |
| 16:49 | <dlbass> lol workded
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| 16:49 | you are "teh 1337 LTSP man of teh dai"
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| 16:50 | booting up two more to see what happens!
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| 16:50 | now I will go get hit by a car since I missed two stinking lines and caused you all that!
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| 16:51 | 37 and 36 work
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| 16:52 | they can both open web browsers!
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| 16:52 | 34 is broken, but surely that is my fault also, and in the production server it willwork!
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| 16:55 | I've got to go, but again, and again, and again, thank you so much for your help! Hopefully this is going to give the breath of life to a lab of 12 year old Dell GX110s for an elementary school! Only if this worked over wireless!
| |
| 16:55 | <vagrantc> yay!
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| 16:56 | <dlbass> cya later!
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| 16:56 | <vagrantc> there are tricks with wireless, but there's just not enough bandwidth, really
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| 23:06 | <viks_> tftp access violation error is getting ...how to resolve it
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| 23:07 | <muppis> https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP#Verify%20that%20the%20tftp%20files%20are%20there
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| 23:08 | Specially pointing to permissions.
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| 23:16 | <viks_> tftp 10.160.31.10 -v -m binary -c get /ltsp/i386/pxelinux.0 when i ran this command ...it is still giving access violation error
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| 00:00 | --- Tue Apr 26 2011 | |