Goood morning :)
ssh for secure authentication - you just asked about non-encrypted
i'm confused or you're just not being clear
anyway, bed &
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dubkat, authentication encryption != session encryption
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Anyone here know how I can force a umask for all people who log in to Gnome?
I set it in /etc/profile, but apparently that does nothing to the Gnome session. I set it in a script that runs on Gnome startup, but I think that only affects the script and not the whole session
I think it can be done via ~/.gnomerc, but I would like to avoid user-specific configuration.
Hyperbyte: ubuntu? read /etc/login.defs
# Therefore the use of pam_umask is recommended as the solution which
# catches all these cases on PAM-enabled systems.
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Hrm, I changed it to 002 in /etc/login.defs but it's still 0022 when I type 'umask' in a Gnome terminal
Or do I need to restart the server?
Hyperbyte: don't change login.defs, READ it :)
I.e. use it as documentation, not as a configuration file
I did... but from what I can gather, it's a configuration file?
# /etc/login.defs - Configuration control definitions for the login package.
It is a configuration file, and inside it they mention why you should NOT using for umask, and what to use instead
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Sorry, I don't see that in the file...
Let me go back a step.
Hyperbyte: see what I pasted above:
Don't you have those in your login.defs?
I have a directory in /home/ with shared files. I want all files and directories created in there to be group-writable.
No, that's not in my login.defs
There's a whole paragraph about the umask problem, and there's advice on where to set it
Hmmm let me boot a natty vm...
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Hmmm they deleted all the comments, let me paste you mine...
Search for umask: http://pastebin.com/dJ4uUzKG
There was a looooong talk about umask in bug reports etc, and that paragraph best summarized the situation
I don't know why they deleted it in natty, maybe something even newer came up?
So how do you use pam_umask? It's not a command, can't find any configuration pertaining to it, except /etc/login.defs
Okay, so basically I add "session optional pam_umask.so umask=002" to /etc/pam.d/common-session, correct?
|02:36||* Hyperbyte high fives alkisg|
|02:36||* alkisg hasn't fiddled with umask for a long while... glad I was able to help :)|
Strange that this can't be found so easily via Google... all I found was a whole bunch of Ubuntu forums threads talking about /etc/profile
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hi Hyperbyte !!
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I have a 2x dualcore 2.2ghz (opteron) with 16gb ram. Would it be powerfull enough to power 4 thin clients?
|05:41||* alkisg is using core 2 duos with 3 Gb RAM to power school labs with 12 thin clients :)|
So yeah, more than powerful enough
What is the speed like?
Gigabit network everywhere?
So all will be fine except for 3d apps and for flash
Flash will kill the cpu (but ok for 4 clients) and doesn't use xv acceleration so it also kills all the network bandwidth, escpecially for fullscreen
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alkisg: I'm doing it on a budget. How powerfull will the thin clients need to be (Picked up the server for 30quid on ebay :D)
All that needs to run is web browser and editors. Occational gcc.
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It depends on the expected use. A web browser can e.g. be "reading wikipedia" == minimum cpu/bandwidth, or "watching youtube" == maximum cpu/bandwidth
The recommented minimum is something with 256 ram, for thin client use only
While with 512 RAM and more, you can start using localapps (local firefox/flash => runs faster on some occations)
For only 4 clients you should be able to avoid localapps...
(the bare minimum is 64 ram, but that's asking for trouble :))
Its only for home use.
The ones I've looked into have 512mb/1gb ram.
Should be fine then
Awesome. once again thanks for your help.
I have found a Wyse V90L for 30 quid + p&p. Is 10/100 network fast enough for the client?
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The network is more important than cpu usually
Also if you have a mixed-mode network (half gigabit, half 100mbps) you need to watch out for the flow control problem: https://help.ubuntu.com/community/UbuntuLTSP/FlowControl
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how are you ?
And "pink" she put down the telephone (that's from a joke, isn't it?)
yes it is lol
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good morning everyone
good morrow mgariepy
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Hi, I've tried LTSP with Edubuntu 11.04 without Unity. However my thin clients automaticaly run by default Unity. How can I change my server or client chroot in order to have the classic gnome (without effect) automaticaly by default on my thin clients ?
antoiner, in LDM, you can click on "preferences" then "session" and select "ubuntu-classic no effect"
mgariepy: I want to avoid user interaction with that part ..... in fact if I can get totaly rid of Unity it's better.
mgariepy: I do not have any grief against Unity, it's just it does not still offer me what I need to.
i have a ldm package that fixes the LDM_SESSION related to https://bugs.launchpad.net/bugs/770323
antoiner, maybe this is what you need " https://lists.ubuntu.com/archives/edubuntu-users/2011-April/006691.html
mgariepy: I've tried the manual override in the mailling list : I've changed lts.conf, made the script and made it executable and ran my thin client and nothing ...... Is there something I'm missing ?
antoiner, try installing this package in your chroot and set the LDM_SESSION="gnome --session=2d-gnome" https://launchpad.net/~mgariepy/+archive/ppa/+files/ldm_2.2.2%7Ebzr1383-0ubuntu1%7Eppa1%7Ereally-2.2.1_i386.deb
this should work.
i also have a 64bit package if necessary in my ppa.
thank you very much
you are welcome :)
by the way, do you know a method that I can use to replace openssh to lsh ? Or at least where I can look for changing openssh/ltsp link ?
antoiner, no i use localapps to prevent saturated network problem and it's working great even with italc.
;) I see you saw my e-mail ;)
mgariepy: What does your ltsp package in your ppa ? version upgrade ?
it's the latest code from the trunk
antoiner, i made it to fix https://bugs.launchpad.net/bugs/770323
mgariepy: One last question ... is Italc of edubuntu 11.04 is broken ? I can't get ICA work .... :(
i haven't tried it with 11.04 yet.
mgariepy: Thank you for your help ! Too bad for the lsh theme because the zlib/huffmann compression of openssh is quite weak and it's never bad, in a atom thin client, to try to lower network stress. I'll use
antoiner: video compression would kill the server cpu just for a couple of clients
So it wouldn't be a good thing
Video is not the only case where network is saturated ... it saturates in general when the whole screen change .....
video, screensaver (which i set as mandatory to black) and mostly games saturate the network, when an applications saturate too much the network it makes sense to run it locally.
It makes sense but it's not always the best solution.
The economic model of a LTSP solution is to center everything to the server.
When using for instance CAD software or softwares like blender, you'll like to build a strong server with thin clients and not put too much power to the thin clients.
However this is turning to be too complex because the network is saturated easily (bandwidth and packets per seconds).
Trouble that can be avoided by doing a very small X-Forward cache with a better compression method than the one forced by openssh in sshv2 protocol
Have you actually tried this, or you just suppose that it would work?
Because in my experiense, compression in lan only makes matter worse
it's just bluepaper ....... I try to do it. Here in my test lab of 30 thin clients, enabling the compression of openssh made things quicker without a big payload (Server is a Core 2 Duo at 2.4Ghz and clients are Atom N270)
Do you have actual numbers? Bandwidth, cpu usage etc?
I believe even if just a few clients visit youtube with compression on, the server cpu usage will be 100%
in a youtube usage the server cpu is at less than 10% and the client one less than 10%
and the bandwith is at near 90Mbps with is the top it can achieve with 2000 packets per sec
and 90Mbps in a windowed mode
not fullscreen witch is impossible to see
That's with LDM_DIRECTX=False, whch is usually the default setting?
Or with LDM_DIRECTX=True?
Then you're *NOT* using ssh
Not compression, not anything
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I thought it was only the encrypting algorithm
Try again with LDM_DIRECTX=False, which is the default, you'll see what I'm talking about
You won't be able to work with more than just a few clients
ok doing right now
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lol all the window managers broke ........ I need to reinstall first ....... Thank you for the Tip. By the way, lowering to arcfour does not makes things better ?
no ssh might be a bad idea..
btw alkisg_web does it use HPN by default?
High Performance SSH
i dont even know if you can in this situation
but i believe ssh is limited to 64k by default
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what are the requisities for HPN ?
i just thought of hpn tbh i dont even know if it can be used in this context
im not sure if it works with interactive sessions
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|12:11||* alkisg could reuse those as closets :D|
anyone has an objection to me tagging a new ldm for upload in Oneiric ?
ldm v3.0.0? :p
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nah, enough 3.0 for the week :)
Created tag ldm-2.2.2.
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hi all, I'm in troubles to get booting a thin client. I've configured the box at mi datacenter and boots fine. The box must be at fabrile store, its place is trought a fiber optic link and a a switch, installed there I've receive "nfs server not responding, still trying"
and never boots
I have other boxes there and works fine, must be a kernel options related issue?
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mgariepy: can you give me the magic string to start in classic gnome mode ? (value of LDM_SESSION)
mgariepy: nevermind, got it
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Someone knows witch tftp server is used for ltsp under edubuntu 11.04 ? I try to restart it without restarting the whole server after installing ltsp ..... I've tried openbsd-tftp and tftpd-hpa but no results ...
might still be openbsd-inetd
antoiner: netstat -nlp will tell you what process is listening the tftp port
it tells me "in.tftpd" ...... what is this tftp daemon ?
dpkg -S in.tftpd :)
or just shoot it using `kill` to that process
it will be respawned... most likely :p
grep tftp /etc/inetd.conf
/etc/init.d/tftpd-hpa restart ?
unless it's configured to run from inetd
which was the default for a long time ... not sure when ubuntu switched
if it's inetd it would be "restarted" on each connection
so it's running standalone
vagrantc: nothing appear
ok, good. yes, tftpd-hpa then
mnemoc: done it but the TFTP still gives me timeout .... the worse is that if I restart the computer then it works ...... It's just I try to do a script that activate ltsp without restarting it and without using the install script
it says me that it cannot open connection
antoiner: confirm it's pid changes when doing the restart
antoiner: it may be blocked
in which case an stop + start might be better
mnemoc: already tried the stop start ....... also via "service tftpd-hpa stop/start"
and /etc/init.d/tftpd-hpa ?
but well, just confirm it's down after stop-ing it
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yes I confirm it's down after a stop
and the pid change when I start it again either way ....
is there any firewall thing or apparmor thing ?
my installation is just edubuntu + apt-get install ltsp-standalone-server
check iptables-save .... but afaik there is no firewalling by default on ubuntu
nothing in iptable-save only comments
anyone on Debian or Ubuntu but you have rpm installed? I need a quick test.
sorry I don't have alien or rpm installed on my system
warren: I can install them if you still need the test
mnemoc, nevermind, got help in #debian
Nah, it's "key". I was just randoming though. )
Hey, while we're on the subject of thin computing... smartphones are pretty thin, right?
My boss broke the touchscreen of his HTC Desire HD... he said the phone sucks and he's gonna buy an iPhone. That hurt me, so I offered to replace his screen if he ordered a new one.
they count as fat, as they run local apps ;-)
I am -never- -ever- -under- -no- -circumstance- doing that again.
If you're curious what a HTC Desire HD looks like when it's all taken apart, see: http://twitpic.com/54qf5d/full
Oh, and in case you're wondering - yes, you have to disassemble the entire mainboard before it lets go of the screen.
I got it though eventually. Took me a little over 3 hours I think.
It helped that the screen was already broken. Normally it's a bitch to remove, because it's glued to the chassis... nearly impossible to remove without breaking, unless you heat it so much the glue melts.
But since the screen was broken, I just got creative.
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Seriously though... -never- -ever- again. http://twitpic.com/54rsxv
On that note, good night. =)
Hyperbyte lol. crazy.
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isnt memory shared when several users are using firefox for example?
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the channel is too quite :P
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