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


Channel log from 16 September 2010   (all times are UTC)

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02:00
<gnunux>
hi
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07:09
<sidartha>
anyone know how to install firefox addons globaly in chroot?
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08:09
<sidartha>
anyone know how to install firefox addons globaly in chroot?
08:18
<Appiah>
chroot as in firefox as a local application?
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08:30
<sidartha>
yes
08:33
<Appiah>
I've read some mozilla docs on making settings work globaly
08:34
you should follow them, there are no special things you have to do just beacuse you're running LTSP
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08:38
<sidartha>
so if I run "firefox --global-install addblock.xpi /firefox/addons" that will work?
08:38
from chroot
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09:49
<Kyle__>
Morning.
09:50
Every once in awhile I boot one of my fat-clients, and it never comes up. What I see on the screen (because I took out quiet and entered nosplash), is the following two lines repeating peridocially:
09:50
INFO: task lspci:400 blocked for more than 120 seconds.
09:50
"echo 0> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
09:50
Now, I don't mind disabling the message, but I'd rather the system boot properly :)
09:50
Any ideas?
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15:29
<markit>
hi alkisg :) will you be online tomorrow morning? I will bring back the server to school and try again the login of clients. Would love have your help in the unfortunate case it does not work
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15:30
<Sorinan>
Is there a way to run smartcard readers on LTSP clients?
15:32
<alkisg>
markit: hi, we've just uploaded the new sch-scripts so you may tell dgroos to update his version if you want
15:32
I'll be online for some hours...
15:34
<markit>
it's 22.36 here, what time is it there?
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15:35
<alkisg>
+1
15:36
<markit>
ok, what time is better for you tomorrow?
15:36
I mean, feel free to do whatever you want, just to know when I've the most probability to meet you and not busy
15:36
<alkisg>
After 15:00 local time I'll be online, mostly...
15:37
I'll be writing a sch-scripts presentation so no problem, ping me whenever you want
15:37
<markit>
oh, I'll be at school in the mornint (11.00 of your time), at 15.00 I probably will be happy or have committed a suicide, lol
15:37
<alkisg>
...but remember that there are others here that can help too :)
15:38
<markit>
sure, but I'm not good in making new friends.. ;)
15:38
(just kidding)
15:39
alkisg: in any case, as far as I've understood, having disable nbd-proxy can never be the reason of login troubles
15:39
<alkisg>
I may be around before that too, just not sure...
15:39
<markit>
I've tried here at home with also a gbit switch in between, and boots and logs like a charm
15:39
so I'm optimistic
15:39
<alkisg>
Yeah, nbd doesn't have anything to do with logins
15:40
<markit>
alkisg: btw, are you aware of any way to force ssh to send traffic in clear, just for debugging purpouse?
15:40
would love to wireshark the traffic and see exactly what the client sends when tries to log
15:40
but is, of course, crypted
15:41
<alkisg>
There once was a "null cipher" patch that could be applied to ssh, but I've never tried applying + compiling it
15:41
<markit>
ok, I dreamed about a "ssh_clear" package or something like that
15:41
<alkisg>
But even that was after the login, so it wouldn't help you...
15:41
<markit>
ok, I'll see what will happen tomorrow
15:41
<alkisg>
k, good luck
15:42
<markit>
alkisg: btw, dgroos never sent me the email with the translation... do you have his email to give me in private?
15:42
so I can ask him for the new version translation
15:43
<alkisg>
It's on that mailing list link I sent you a while ago...
15:43
I don't have it handy
15:43
<markit>
ok, don't worry, I will find him
15:43
keep the good work on sch-scripts without further distractions ;)
15:43* markit feels guilty
15:45
<alkisg>
Nah, end of day here, I've finished half an hour ago :)
15:48
<markit>
any "what's new" I can understand?
15:48
is it a bugfix? New features? KDE support? ;)
15:53
<alkisg>
Heh
15:54
No, KDE is out of the question :)
15:55
One "easy to understand" is mass user creation: http://users.sch.gr/alkisg/tosteki/index.php?action=dlattach;topic=3005.0;attach=1896;image
15:55
+automatic packages installation for primary, secondary etc education levels
15:56
<markit>
is user list loaded from a csv file or entered directly in the application?
15:57
<alkisg>
It's autogenerated, the teacher just provides the names of the classes + the number of pcs
15:57
<markit>
and does "promote" students from first class group to second etc. when needed?
15:57
<alkisg>
We have another tool for importing/exporting users to .csv
15:57
Nope, that will be done in future tools - we have until the next september for that :)
15:57
<markit>
sure :))
16:01
alkisg: don't remember if I've already asked you, do you use ACL and some dir with rw permissions for teacher and students as well?
16:01
and also, do you have only one "teacer" account like I have (the "administrator" for ubuntu), or one for each teacher?
16:01
<alkisg>
The teacher has 2 folders for each class, one read only where it puts assignments, and one read-write for the kids to collaborate
16:02
The students see those on their desktops with symlinks
16:02
One for each teacher, but in 90% of the cases there's only one teacher...
16:03
<markit>
mmm how can you provide "superuser" power to multiple accounts? is there an easy way in ubuntu?
16:03
<alkisg>
sure, just make them administrators from the user management tool
16:04
It's users-admin on gnome, I think kuser on kde?
16:04
<markit>
I've only command line
16:04
<alkisg>
sudo usermod -a -G admin teacher2
16:04
<markit>
does this "management tool" be in ubuntu?
16:04
oh, I see theacher belongs to multiple groups
16:04
plugdev lpadmin etc
16:05
so is just a matter to add to all those groups and add also in the sudoes list?
16:06
<alkisg>
No need to modify the sudoers list
16:06
Just add the teacher to the admin group either with kuser or with the usermod command I wrote above
16:06
<markit>
and is the teacher able to read/write student's home folder, or the student have to "push" his work in tha shared, common folder? there is the risk another student can modify/erase...
16:07
I think that have many teacher's account is a good idea, so no one can mess other's work
16:07
teachers are not very proof in IT here
16:09
<alkisg>
For the teacher to modify the students files, he'd need to use his admin rights (e.g. sudo etc)
16:10
Or, you could change the umask appropriately and put him on the students groups
16:10
<markit>
alkisg: home dir are created with the group with the same name of the account
16:10
there is no a "students" group
16:11
as primary group of the student account... I have to understand this stuff much better I guess
16:11
never really used GNU/linux as multiuser until now, only some basic (shared) samba stuff
16:11
<alkisg>
There are many ways to organize those things, read up a little and choose whatever suits you better
16:12
I think Lns had written some wiki or blog page about ACLs, they worked for him
16:12
<markit>
I've found a wonderful video in ubuntu ltsp page about acl, just have to try it
16:12
<alkisg>
I don't use them, I don't have need for them yet
16:12
<markit>
but your experience is invaluable to "how to do the right things"
16:13
<alkisg>
Nah, I'm fairly new to linux, only 3 years experience
16:13
<markit>
alkisg: not for the shared folder? I'm surprised
16:13
<alkisg>
Others here have been using it for decades...
16:13
<markit>
because if a user created a file, it's rw-r-r
16:14
<alkisg>
With the default umask yes, but you can change that
16:14
<markit>
sure, but this messes ALL the created files, not only in the shared folder
16:14
that's where ACL comes in, since you can define in a "folder" basis
16:14
<alkisg>
Right, and sometimes it's a good thing
16:14
E.g. some teachers don't want the students to be able to see each other's files
16:14
So, they use rw-rw----
16:15
<markit>
that's good, right
16:15
<alkisg>
...and the teacher has write access through the group
16:15
<markit>
as I said, I've plenty of things to learn from you :)
16:16
I'll try this solution asap, thanks
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16:38
<markit>
alkisg: rw-rw---- seems not correct, since all students belong to the same primary group "students", with that mask everyone can read/write other's files
16:39
did you meant rw-------?
16:39
<alkisg>
Well, one easy way is to add those students as the teacher secondary group
16:39
So each teacher has access to the students he teaches
16:40
Another way would be to use the class group as the student primary group, but then the other students of the same class would also have access - you probably don't want that
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16:42
<alkisg>
markit: so, student "user1class1" has primary group "user1class1", and the teacher has secondary groups for all those students "user1class1, user2class1 etc"
16:42
<markit>
maybe I've not clear the role of secondary groups... because I think that if students belog to "teacher" group, the risk is that they can read/write where only teachers should be allowed to
16:42
<alkisg>
That's one way to do it... there are million others
16:42
<markit>
alkisg: I would love to do as you do, in the beginning :)
16:42
<alkisg>
No, the teacher would belong to the user1class1 group. Not the other way around.
16:43
<markit>
I've to make it work soon, and many time to make it better, but a wrong start means a lot of work (and upset users) later
16:44
yes, misunderstood your "add those students as the teacher secondary group". But add maybe an hundred of students(group) to teacher seems not fine to me
16:45
<alkisg>
It works though :)
16:45
<markit>
(since each student has also a group with the same name, correct? or you just create with "students" group directly as primary group?
16:45
<alkisg>
The way I said it above, no, each user keep his own primary group
16:46
If you put all of them to the same "class1" group, then they'll have access to each other's files
16:46
or, the teacher would need to use admin rights to access them
16:46
<markit>
sorry, missed those lines, was deepling thinking about abstract consequences
16:46
now I read carefully
16:47
<alkisg>
ACLs make group organization much easier, sure, that's why they exist
16:48
<markit>
was thinking the same thing
16:48
<alkisg>
I.e. give access to the teacher but not to the students
16:48
<markit>
I'll try them tonight
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17:04
<alkisg>
What I'd like is the teacher to NOT have access to rw------ files on the students dir (e.g. ~/.ssh, passwords etc)
17:04
I don't know if ACLs can do that..
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17:34
<logitech>
hmm, why is it that the automatic boot just keeps counting down over and over without booting?
17:35
by the way, kiwi ltsp
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19:44
<cole2>
Hey everyone, I was wondering if there is a common cause for clients viewing javascript heavy webpages to slow right down.
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21:29
<cole2>
Is there anybody out there?
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