IRC Logs

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