IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 24 April 2013   (all times are UTC)

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02:20
<andygraybeal>
omg.. i got ldap to work
02:20
err.. ldap auth
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06:06
<administrator>
cant boot
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06:07
<alkisg>
Why?
06:07
<Guest21209>
network boot
06:07
<alkisg>
Error?
06:07
<Guest21209>
not supported
06:08
<alkisg>
...I think you should mention more details about the problem, the error message, the distribution you're using, the version, etc etc...
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09:08
<dyllan>
hi all.
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10:01
<alkisg>
!learn local-disks as `On fat clients, only sudoers have access to local disks. One way to give access to non sudoers, is to put in lts.conf: RCFILE_01="mkdir -p /media/local_disk && mount /dev/sda1 /media/local_disk"`
10:01
<ltsp>
The operation succeeded.
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10:36
<ogra_>
work_alkisg, why dont you just drop a NOPASSWD entry in the /etc/sudoers.d dir ?
10:36
<work_alkisg>
ogra_: because e.g. I don't want them to erase C:\Windows, I just want to give them access to D:\
10:36
I don't want them to be sudoers...
10:36
<ogra_>
ah
10:37
they dont need to be sudoers
10:37
<work_alkisg>
How so?
10:37
<ogra_>
all users are in plugdev ...
10:37
<work_alkisg>
Internal disks aren't in the plugdev group
10:37
<ogra_>
so you give NOPASSWD access to the plugdev group
10:38
<work_alkisg>
internal disks are owned by root:disk
10:38
<ogra_>
ah, yeah, you dont want users to be in the disk group
10:39
you could ship a udev rule alongside indeed
10:39
<work_alkisg>
It's configurable by policykit
10:39
<ogra_>
that too
10:39
<work_alkisg>
But with just an RCFILE directive, one can select which partition he wants too... and disallow other users from unmounting it, etc etc
10:40
<ogra_>
yeah
10:40
<work_alkisg>
Anyways, gotta go, cheers + bbl
10:40
<ogra_>
just pretty complex
10:40
ciao
10:48
<Hyperbyte>
A bit offtopic, but anyone here who is experienced with building servers (hardware-wise)?
10:49
I've never built a server with enterprise class hardware and I'm wondering if someone could give me some feedback on my hardware list/specs...
10:52
http://pastebin.com/EDTSean4
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12:54
<jammcq>
Hyperbyte: I learned a long time ago to save myself from frustration and just go with a good solid name brand server. I've been buying Dell servers and been VERY happy with them
12:58
<ogra_>
++
13:00
<stgraber>
I personally have a preference for HP servers as their RAID hardware tends to have much better Linux support than DELL's (I had to hand-patch some kernels to deal with newgen PERCs). And the entry level machines like a DL180 can be found < 2000$ (can go much higher depending on CPU/RAM/storage obviously)
13:00
<jammcq>
HP, Dell, IBM... they're all pretty good
13:01
but cobbling together a server is fun when you are young, but after you've done it a few times, it's just a pain
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13:07
<stgraber>
though to be fair SuperMicro make extremely good machines and pretty cheap. I've got friends that have been buying tons of those lately, though they order pre-assembled units (which is still much cheaper than some of the other big brands)
13:07
<jammcq>
pre-assembled is the key
13:07
everything fits
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13:09
<Hyperbyte>
jammcq, yeah I know. ;-)
13:10
I've seen some pre-assembled servers, those are pretty nice
13:10
It's like you said though... building one yourself is fun when you haven't done it before. :)
13:11
<jammcq>
Hyperbyte: what raid controller would you use?
13:11
<Hyperbyte>
Onboard one
13:11
<jammcq>
what is it?
13:11
is it any good?
13:12
how about power supplies? dual ?
13:12
are the disks hot-swappable ?
13:12
maybe none of that is important to you
13:12
<Hyperbyte>
Not sure about onboard RAID, motherboard specs: http://www.supermicro.com/Aplus/motherboard/Opteron6100/SR56x0/H8DG6-F.cfm
13:12
<jammcq>
but it sure is nice to not have to shutdown to replace a power supply, hard disk, fan,...
13:12
cuz all of those things fail
13:13
<Hyperbyte>
Yeah, those last points are very important actually. I need this thing running without interruptions really. :) Fans are hotswappable, so are power supplies (dual) and so are all harddisks (RAID)
13:13
<jammcq>
does the case include a hot swap disk cage?
13:13
<Hyperbyte>
Yep.
13:14
<jammcq>
integrated matrox video... wow, haven't seen that name in years
13:14
<Hyperbyte>
Hehe
13:15
<jammcq>
ah, includes IPMI, that's very handy
13:15
I can show you how to talk to it remotely
13:15
<Hyperbyte>
This is the case, by the way: http://www.supermicro.com/products/chassis/4U/745/SC745TQ-R1200.cfm
13:16
<jammcq>
wow, i've got one sitting about 3 feet from me that looks very much like that
13:16
<Hyperbyte>
By the way, speaking of preassembled vs self-built... one of the things I like about this case + motherboard, is that they were designed for eachother.
13:16
<jammcq>
that helps
13:16
when I built mine, I used an Intel motherboard
13:16
that's where the trouble started
13:17
things didn't line up properly
13:17
fans weren't right
13:17
video card didn't fit
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13:18
<Hyperbyte>
With the motherboard specifications, it does a few case recommendations, of cases that are optimized for the board. I picked one of those.
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13:49
<lifeboy>
Hi all! I upgraded an LTSP server from Ubuntu 10.10, to 11.04, to 11.10 and finally to 12.04. All went really well, except that dhcpd seems to be misconfigured. Is there a known issue with one of these upgrades by chance that I'm not aware of?
13:51
Although the service is configured and running on port 67, it doesn't serve addresses, although the configuration is unchanged
13:54
<jammcq>
maybe it's only listening on lo
13:55
try: netstat -antp | grep ":67"
13:55
err
13:55
take the 't' out
13:56
netstat -anp | grep ":67"
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14:41
<lifeboy>
jammcq: I was just reading up on how to split the logging of dhcpd to /var/log/dhcpd.log instead of syslog, ... then I'll check the results
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14:45
<unkmar>
I attempted installing icedove and get a lot of errors.
14:47
just great. I get to reinstall the whole thing ALL over again.
14:48* vagrantc wonders how all these errors show up simply installing packages
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14:49
<vagrantc>
unkmar: could you cut and paste the errors to a pastebin?
14:49
!pastebin
14:49
<ltsp>
pastebin: the LTSP pastebin is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebin, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
14:50
<unkmar>
vagrantc: I installed gnome3 and left lxde in there. Added google chrome, then added icedove. At that point it screaches about jre, mono, and a huge list of stuff.
14:51
<vagrantc>
unkmar: what apt repositories are you using?
14:51
unkmar: and what do you mean about screaches?
14:53
<unkmar>
http://pastebin.com/0L7Bqtbu
14:55
<vagrantc>
unkmar: i don't see any error there ... if you could cut-and-paste exactly what's on the screen, that would be helpful
14:56
unkmar: but sounds like you're using a third party repository ... all bets are off there
14:56
<unkmar>
I can't. I'm doing a fresh install. I want to. So that I get the install, configure process documented and memorized. i did not use 3rd party for icedove. Though adding the 3rd party for google chrome possibly made it mad.
14:58
I'll likely hit the same problem again during the process so. Just hold tight. :)
14:58
<vagrantc>
yeah, third party repositories, while not inherrantly problematic, often don't follow the packaging guidelines that make debian work
14:58
won't be around much today, but good luck
14:59
<unkmar>
I'll be doing the install process reversed. with the google chrome going last.
15:06
<vagrantc>
keep a log of your exact errors...
15:15
<unkmar>
I blinked during tasksel. Forgot to remove Graphical desktop for the server. That would take a why to download. :(
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15:19
<ltspuser_40>
Hi
15:19
I'm using a rdesktop connection to a linux server
15:19
and I'm using sshfs to mount a pen drive
15:19
from the terminal to the server
15:20
the problem is when I edit some file of the pen, the changes are not saved...
15:21
is there any way to mount an usb pen using udev on the terminal without cache?
15:23
<andygraybeal>
ltspuser_40, i know that the FUSE system clears it's cache like every 2 seconds or something
15:23
but your using sshfs ... so i dunno :) i'll sit back and wait for an answer.
15:24
<vagrantc>
unkmar: i've found it's often faster to reinstall than wait for desktop installs to finish
15:25
<ltspuser_40>
is there any way using FUSE??
15:25
if you could explain...
15:25
<vagrantc>
ltspuser_40: there was some support for that built in to the rdesktop scripts... are you using that, or something else?
15:29
<ltspuser_40>
to mount I'm using ltspfs_mount...
15:29
command
15:30
if you can provide me a way to mount usb drives
15:30
<vagrantc>
ltspuser_40: you're doing it manually?
15:31
<unkmar>
vagrantc: that's what I did and install is complete. Now for the quick little ltsp install.
15:34
<ltspuser_40>
yes...
15:34
<vagrantc>
unkmar: are you using a caching proxy for all this? speeds up reinstalls tremendously...
15:34
ltspuser_40: there's some way to do it from the code, but i haven't done so myself
15:34
<ltspuser_40>
I have udev rules to detect the insertion of the usb and then I run a script that execute the command ltspfs_mount
15:34
<unkmar>
that would require me to set one up. Thankfully I have 50+ megabit connection.
15:35
<vagrantc>
ltspuser_40: essentially, it mounts a local ltspfs mount as root, and then passes /media/root as a drive to rdesktop...
15:35
unkmar: ah, that would probably make it barely worth it, yes. :)
15:35
<ltspuser_40>
it mount on /var/run/drives...
15:35
<unkmar>
the pfsense box may be caching some of it. though i doubt it.
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15:35
<vagrantc>
ltspuser_40: shouldn't need custom udev rules
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15:36
<ltspuser_40>
yes...
15:36
I understand but I needed to do it manually
15:37
<vagrantc>
ltspuser_40: i don't know the answer, but i know it's possible
15:37
<ltspuser_40>
ok
15:37
thank you
15:37
<unkmar>
the pfsense box may be caching some of it. though i doubt it.
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15:38
<unkmar>
oops, sorry about that.
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16:01
<lifeboy>
jammcq: I get udp 0 0 0.0.0.0:67 0.0.0.0:* 2265/dhcpd
16:02
and $ sudo ps ax | grep dhcp
16:02
2265 ? Ss 0:00 /usr/sbin/dhcpd -f -q -4 -pf /run/dhcp-server/dhcpd.pid -cf /etc/ltsp/dhcpd.conf eth1
16:03
<unkmar>
vagrantc: you there? isn't it nfsroot=ip:/opt/ltsp/amd64 ???
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16:04
<vagrantc>
unkmar: that's valid, sure
16:04
unkmar: you could also do /opt/ltsp/amd64, if the DHCP settings were close enough
16:04
unkmar: er, nfsroot=/opt/ltsp/amd64
16:04
<unkmar>
right.
16:05
<vagrantc>
i don't remember if it still inherrits next-server, which you've got set. (i.e. use the tftp-server if not specified in root-path)
16:06
<unkmar>
testing in, 3, 2, 1....
16:07
no ip = fail. :(
16:09
okay, I've missed something. <pout>
16:10
reviewing instructions before requesting assistance with nfsmount: need apath.
16:11
<vagrantc>
unkmar: there are 3 steps, edit /opt/ltsp/<arch>/etc/ltsp/update-kernels.conf, ltsp-chroot /usr/share/ltsp/update-kernels, ltsp-update-kernels
16:12
unkmar: if you want to just manually tweak it, edit pxelinux.cfg/default in <tftp>/ltsp/<arch>/pxelinux.cfg/default
16:12
<unkmar>
that's it. I missed the ltsp-chroot update-kernels.
16:14
<vagrantc>
i.e. configure it, run the binary that generates the pxelinux configuration, copy the kernel+initramfs+pxelinux stuff over to the tftp dir
16:15
<workingcats>
hello, i'm having a little trouble with ltsp on zentyal3/ubuntu1204. sometimes it just hangs on logon, displaying the busy mouse pointer
16:15
<unkmar>
voila, we have desktop.
16:15
well, login. Desktop comes after I add user. :)
16:16
<workingcats>
i cant find anything in Xorg.?.log, dmesg or .xsession-errors.. i'm lost, i just don't know where to even look beyond those places :/
16:16
<lifeboy>
I have put relevant file contents and logs at http://pastebin.com/mJsnngwH regarding the dhcpd problem I have after upgrading my LTSP server from Ubuntu 10.10 to 12.04
16:17
jammcq: forgot to mention you above...
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16:18
<unkmar>
ah, and that still don't work, because I didn't install a desktop manager.
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16:19
<lifeboy>
If anyone would like to venture a solution to get my dhcpd handing out addresses again? http://pastebin.com/mJsnngwH
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16:24
<unkmar>
lifeboy: sorry, I don't know. Been several years since I played with dhcpd.
16:25
<workingcats>
lifeboy, is this just in the pastebin or did you copy the output of ifconfig into the first config file?
16:26
lines 14-45 in your paste
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16:29
<unkmar>
installing icedove
16:30
<workingcats>
lifeboy, in any case, i think this might be what is getting you - so you'll have to get your clients to send a client id AIUI. https://bugzilla.redhat.com/show_bug.cgi?id=851333
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16:38
<lifeboy>
workingcats: No, it's jus tin the pastebin, sorry, not made clear there
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16:41
<lifeboy>
workingcats: I saw the "Dropped DHCPv4 packet with zero-length client-id" error. However, how can I send a client id, when I have remote boot thin clients? They just send what they send, don't they?
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16:43
<lifeboy>
I fixed the pastebin
16:43
<workingcats>
lifeboy, i was wondering the same tbh..
16:44
maybe there is a way to force the server to ignore this security thing? i assume you only run dhcpd on your internal net anyways (bad advice, a huge share of attacks come from the inside, but it's worth a try to confirm whether this is the problem)
16:44
<lifeboy>
I'll be back later, just need to attend to something ... if you notice anything else, or find a way to tell dhcpd to ignore the client id, pls post it.
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16:55
<unkmar>
well, the icedove install went well.
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17:07
<unkmar>
installing chrome
17:07
ps, I cloned the arch directory before adding anything more than icedove.
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20:13
<lifeboy>
Re dhcpd? It seems since v2.4.2 ISC dhcp-server is ignoring client id's with zero length and will ignore a length of one in future as well. How does one set the client length when using a PXE boot client?
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20:33
<alkisg>
lifeboy: did you rebuild your chroot?
20:34
<lifeboy>
no, I didn't. I don't think this is an LTSP issue per se, but rather a dhcpd issue, or am I wrong?
20:35
<alkisg>
You're probably wrong, it's an udhcpc issue
20:35
That's in the client initramfs
20:35
It had an ancient version there, and I filed a bug in ubuntu to get it in sync with debian, a couple of years ago...
20:36
The newer dhcpd is more strict than the old one, but it's still a client problem and not a server problem
20:36
<unkmar>
* random gibbersh. We don't need persistence. We changed our mind. We need persistance.
20:37
so. How about some network share based persistance?
20:37
<lifeboy>
ok, but when the client starts up in PXE, it needs an ip address before anything else can happend. tftp is not even connected to yet. Or am I misunderstanding this?
20:37
<alkisg>
lifeboy: there are 2 dhcp requests when the client boots
20:37
One, from the NIC BIOS, its PXE stack
20:37
Then pxelinux.0 is loaded, then vmlinuz and initrd are loaded
20:38
Then, there's a second dhcp request by udhcpc
20:38
udhcpc had a problem there, it sent an empty identifier
20:38
Then, if that succeeds, nbd is mounted and the real boot starts
20:39
<lifeboy>
This problem occurs at the first request. The client never gets and ip address, so the boot process stop before LTSP is involved.
20:39
<alkisg>
So... do you see things like "loading pxelinux.0" etc? Or you think the problem is in the first dhcp request?
20:39
<lifeboy>
sorry... "never gets an ip address"
20:39
<alkisg>
So what's the last lines in the client screen?
20:39
Note that pxelinux.0 now doesn't display anything if it sees "quiet" in the kernel command line...
20:40
<lifeboy>
no, it doesn't get to "loading pxelinux.0", its still in the PXE code part where the spinning \ | / is shown and then ....
20:40
<alkisg>
lifeboy: ah, btw, your router is wrong there in your config, isn't it?
20:40
You can't have a gateway outside of your subnet...
20:41
    option routers 192.168.1.3;
20:41
(that's the gateway for the clients, afaik... I haven't used dhcpd in years)
20:42
Also, I remember that you were not supposed to specify INTERFACES in /etc/default/isc-dhcp-server , but let dhcpd figure it out from the ethX ip
20:43
<lifeboy>
hmmm... it works though (when the dhcp was still working)...
20:43
but thinking about it, yes, it shouldn't be like that
20:43
<alkisg>
The newer version might be more strict, so why not put it right to get it out of the "possible problems" list...
20:44
<lifeboy>
I'll do that and let's see what happens.
20:44
<alkisg>
Btw, why are you saying that you have dhcpd vs 2.4.2? `apt-cache policy isc-dhcp-server` says "4.1.ESV-R4-0ubuntu5.6" here...
20:45
<lifeboy>
I did "dhcpd --version" to get that
20:47
oh, my bad. I looked up the release notes on the isc website and the notes under 2.4.2 say that the code has been made more strict. But yes, "dhcpd --version" says "isc-dhcpd-4.1-ESV-R4"
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20:49
<unkmar>
Hmm, I see.
20:50
<alkisg>
unkmar: what do you mean by persistance? /home persistance? or / persistance, for separate clients?
20:51
<unkmar>
looks like I just need to export /home as (rw) and setup separate users.
20:51
<alkisg>
Why, the default sshfs isn't good enough?
20:51
<unkmar>
is there something like an nfshome= like there is nfsroot= ?
20:52
alkisg: okay, that's good, how do I go about that??
20:52
alkisg: that's going to be a FUSE thing. right?
20:52
<alkisg>
By default, ltsp clients get /home/username with sshfs, for fats + localapps
20:52
You're using debian, right? So you shouldn't need to do anything...
20:53
And of course, true thin clients don't need it, as processes are on the server, accessing /home there directly
20:53
<unkmar>
Okay, then I still missing something. because everytime I reboot, all my settings are lost.
20:54
*I am
20:54
<alkisg>
Fat client? Local (chroot) user or server user?
20:54
Using LDM? Or e.g. LightDM or GDM?
20:56
<unkmar>
I installed lxde. You tell me or remind me how to find out. Cause my brain just went foggy.
20:57
<alkisg>
OK, first. When you login, do you see LTSP anywhere in the login screen?
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20:57
<unkmar>
lightdm. I found it in /etc/init.d
20:57
<alkisg>
Like, a big LTSP logo above the "username" box?
20:57
<unkmar>
booting a client now.
20:57
<lifeboy>
alkisg: I changed the config of the router and restarted the service, but the same error persists. "dhcpd: Dropped DHCPv4 packet with zero-length client-id". This seems to be intentional with isc-dhcp-server now, so unless there's something magic that can be done to convince my thin clients that their PXE bootROMs have to send at least client ids with length 2, I will have to switch to some other DHCP server, since the thin clients are
20:57
all identical. :-(
20:58
<alkisg>
lifeboy: can you try with ipxe?
20:58
!ipxe
20:58
<ltsp>
ipxe: iPXE is the successor to the etherboot/gPXE project, and can be used to netboot clients that don't have a NIC ROM with a PXE stack. To add it to grub, see !grub-ipxe. To add it to the Windows boot loader, see !win32-loader. To download floppy, CD or USB images, visit http://ipxe.org or install the ipxe package.
20:58
<alkisg>
If it works with ipxe, then yeah, switch to another dhcp server
20:58
<lifeboy>
Can't I don't have the hardware. Only Mobo, with onboard NIC, display and RAM...
20:59
ie Real Thin Clients
20:59
<alkisg>
No usb port?
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21:00
<alkisg>
unkmar: typical debian ltsp login screen: http://jonathancarter.org/files/images/ldm_ltsp.png
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21:01
<vagrantc>
unkmar: are you still trying to do the kiosk setup? that wouldn't be persistant
21:02
unkmar: you'd need to do fat clients to get homedir persistance
21:02
unkmar: and then you'd need accounts on the server for each user
21:02
<lifeboy>
Yes, 2 x USB + SDCard slot, but the clients are hundreds of kilometers away on a remote site :-( Not just a matter of plugging something in and testing it unfortunately. It will have to be something I change on the server to fix this.
21:02
Or I revert to an older version on isc-dhcp-server maybe?
21:03
Or will that create other problems?
21:03
<unkmar>
vagrantc: yeah, I know. separate user accounts for persistance. They need a little different then I was originally told. Not that I'm surprised. :)
21:03
vagrantc: what is different in my setup process to do fat clients?
21:04
<lifeboy>
alkisg: Will I create other problems if I try to revert to a v3 dhcp server?
21:04
<vagrantc>
unkmar: create user accounts on the server for each user, and LTSP_FATCLIENT=true in lts.conf
21:04
unkmar: users need to be able to ssh into the server
21:04
unkmar: and ltsp-chroot apt-get install <your favorite desktop applications>
21:05
<alkisg>
lifeboy: no idea, I haven't used isc-dhcpc in years, I've been using dnsmasq for tftp+dhcp+dns..
21:05
<vagrantc>
unkmar: if i remember correctly, you had a lot of ram on your clients ... they should automatically set up as fat clients if you have any desktop sessions installed in the chroot
21:06
<lifeboy>
askisg: I could switch to dnsmasq. I suppose there is a writeup somewhere? I'll google...
21:06
<vagrantc>
unkmar: and lts.conf can either be in /opt/ltsp/<arch>/etc/lts.conf or <tftpdir>/ltsp/<arch>/lts.conf
21:06
unkmar: you might have both /srv/tftp and /var/lib/tftpboot ... but your tftp server likely only uses one of them.
21:07
<unkmar>
do I need to rebuild or restart something? guessin yes. :/
21:07
<vagrantc>
unkmar: shouldn't need to
21:08
<unkmar>
testing in progress.
21:08
<vagrantc>
unkmar: the lts.conf from tftpdir will override /opt/ltsp/<arch>/etc/lts.conf
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21:15
<unkmar>
having problems, I'm working on it.
21:18
still not persistant. :(
21:26
okay, ltsp-chroot adduser bob isn't working anymore.
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21:27
<warren>
sbalneav: hey, curious if Enslaver will be granted ltsp-upstream commit access
21:27
I trust that he knows enough now to avoid breaking things.
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21:32
<vagrantc>
unkmar: don't add the user to the chroot, add it to the server
21:32
<warren>
vagrantc: hi
21:32
<vagrantc>
warren: hi
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21:32
<vagrantc>
warren: i think you should grant Enslaver commit access, for what it's worth
21:32
<warren>
vagrantc: i don't think I have access to grant
21:33
I've been away for so long, my account shouldn't have that kind of power if I do.
21:33* vagrantc never really understood launchpad well
21:33
<warren>
but I looked in launchpad just now, I'm "Approved" not "Administrator"
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21:38
<warren>
bbl
21:42
<unkmar>
vagrantc: that helped.
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23:25
<sbalneav>
warren: Fine by me
23:26
+1 for Enslaver
23:28
<warren>
sbalneav: Idon't have access to grant it
23:30
<sbalneav>
LOL, not sure I do either.
23:30
I know it was discussed at the last meeting.
23:30
vagrantc: you and alkisg ok?
23:32
lemme see if I can figgure this out...
23:38
warren: or Enslaver
23:38
What's yer launchpad id
23:38
<vagrantc>
sbalneav: i've been nudging for Enslaver to get commit access for a while now...
23:38
<sbalneav>
I'll give it to him right now.
23:39
I just need to know his launchpad id
23:39
vagrantc: You need to be far less nudgy and far more sledge-hammery.
23:39
You've met me.
23:40
You should know subtlety isn't my forte :D
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23:42
<vagrantc>
sbalneav: https://launchpad.net/~enslaver-l ?
23:45
<sbalneav>
Bada-bing, bada-boom.
23:45
Try that.
23:46
Enslaver, warren, vagrantc: The deed is done. This contract is sealed.
23:47* sbalneav vanished is a puff of sulpherous smoke
23:47
<sbalneav>
vanishes in a rats
23:47
Spoiled my dramatic exit.
23:47
Gotta take my kid somewhere, back in a bit.
23:51* jammcq missed all the fun :(
23:55
<warren>
Enslaver: there you go
23:56
Enslaver: I'll have a little time to review your changes in ~2 weeks, but that's probably too long to wait.