IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 4 September 2012 (all times are UTC)
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| 03:09 | <alkisg> highvoltage?! Where did jocarter go?! :)
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| 03:13 | <highvoltage> it was the second failed attempt at a nick change
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| 03:13 | I guess I'm stuck with highvoltage forever :)
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| 07:11 | <NeonLicht> !keep ama
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| 07:11 | <ltsp> Error: "keep" is not a valid command.
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| 11:17 | <markit> hi, what importance has belong to groups dialout,cdrom,plugdev,lpadmin? I've noticed that the "system" user that is created at ubuntu installation belongs to those groups, while if I enter "adduser" new user do not
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| 12:44 | <piet> @alkisg: Hi alkis, sitting in lab 2 at the workstation that didn't boot. After patching the ampersand to config-file. The station boots now, the printer can be seen, but it doesn't print. . . .
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| 12:45 | <alkisg> piet: are you using the correct device name?
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| 12:45 | <piet> @alkisg: telnet ip 9100 doesn't print either . . .
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| 12:45 | <alkisg> Get a root console to that station from epoptes, and run `ls /dev/usb*`
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| 12:47 | <piet> @alkisg: /dev/usblp0 as far as I can see
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| 12:47 | <alkisg> And the output of `getltscfg -a` ?
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| 12:50 | <piet> @alkisg what do You expect me to see? There is a PRINTER_0_DEVICE output
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| 12:50 | <alkisg> With value=/dev/usblp0 ?
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| 12:51 | <piet> @alkisg:it doesn't show a value at all
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| 12:52 | <alkisg> piet: getltscfg -a | grep PRINTER
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| 12:52 | (now you're seeing the export line, we want the line with the = sign)
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| 12:54 | <piet> @alkisg /dev/usblp0 and type U
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| 12:54 | <alkisg> piet: and, netstat -nap | grep 9100 ?
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| 12:56 | <piet> @alkisg: says LISTEN
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| 12:56 | <alkisg> jetpipe?
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| 12:57 | <piet> @alkisg Index error: List out of range . . .
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| 12:58 | <alkisg> piet: no, I was wondering if netstat -nap | grep 9100 says "LISTEN jetpipe"
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| 12:58 | i.e. that jetpipe is running
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| 12:58 | If jetpipe is up and running and listening on port 9100, that's about all I can help, I haven't ever used jetpipe
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| 12:59 | <piet> @alkisg: I just let You in. Have a look . . .
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| 12:59 | <alkisg> piet: do you mean that I should open my vnc listener?
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| 12:59 | <alkisg> (you need to run the x11vnc line _after_ i open my server...)
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| 13:00 | <piet> @alkisg ok
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| 13:00 | <bieb> alkisg: how was your vacation?
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| 13:01 | <alkisg> Hi bieb, it was fine, unfortunately it's over :(
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| 13:01 | <piet> @alkisg im right at this pc
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| 13:01 | <bieb> alkisg: I hear that.. they are never long enough
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| 13:05 | <alkisg> piet: I don't see anything weird... jetpipe is listening on port 9100
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| 13:05 | So if it's supposed to print, I don't know why it doesn't
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| 13:05 | * alkisg has never used jetpipe | |
| 13:06 | <piet> @alkisg same hardware configuration works under windows . . .
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| 13:07 | @alkisg so printer, cable, paper, power etc are ok
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| 13:10 | <alkisg> piet: btw, this is a fat client
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| 13:10 | If you're trying to use a usb printer on a fat client, you don't need anything in lts.conf
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| 13:10 | <piet> @alkisg yes, it is
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| 13:10 | <alkisg> No jetpipe, no PRINTER_DEVICE_0 etc
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| 13:11 | <piet> @ alkisg it needs an own cups?
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| 13:11 | <alkisg> It does have cups installed
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| 13:11 | You may put CUPS_SERVER=127.0.0.1 in lts.conf
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| 13:12 | Then the client will only see itself as the printer server, it won't look at the server's printers
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| 13:12 | I think some environment stuff for PRINTER_DEVICE_* is missing from fat clients
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| 13:13 | So it might be easier to use cups instead of jetpipe...
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| 13:13 | You can share printers with cups, with cupsctl enable something
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| 13:13 | Even local ones
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| 13:14 | It's even plug 'n' play if you do it this way, you can plug printers after boot without caring about lts.conf
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| 13:14 | But the env vars for fat clients _do_ need to get fixed...
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| 13:15 | <piet> @alkisg want to have a look for epoptes that doesn't work either? Right now or later?
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| 13:15 | <alkisg> piet: where do you want to launch epoptes from?
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| 13:15 | It needs to run at the ltsp server, so if you want to run it on a fat client, you need remoteaps
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| 13:15 | <piet> @alkisg Do You mean a special ltsp-client?
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| 13:15 | <alkisg> LTSP_REMOTEAPPS=True in lts.conf, and ltsp-remoteapps epoptes
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| 13:16 | Let me check the exact lts.conf setting...
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| 13:16 | REMOTE_APPS=True
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| 13:16 | And then you make a launcher for `ltsp-remoteapps epoptes`
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| 13:16 | That's for fat clients, while for thin clients it works out of the box
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| 13:17 | (I mean the teacher PC; student clients work out of the box, thin or fats)
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| 13:19 | Each epoptes-client can only connect / be controlled by ONE server. You need to launch another epoptes, at the other server, to see its clients.
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| 13:19 | <piet> @alkisg yes, but I don't see clients from the other lab. Des it mean I have to ltsp-remoteapps epoptes to the other server somehow?
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| 13:19 | <alkisg> You can do that with ssh-copy-id server2, and then ssh -X server2 epoptes
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| 13:20 | <piet> @alkisg I will test it tonight . . .
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| 13:21 | <alkisg> Nice
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| 13:22 | <markit> alkisg: just for curiosity, when you install a brand new server, what username do you choose for the user?
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| 13:22 | <alkisg> markit: administrator
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| 13:23 | and "server" for the server
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| 13:23 | <markit> I've used "teacher" and that was not very clever, and I use "gnuserver" for the server
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| 13:23 | <alkisg> "administrator" is the owner of the shared folders, as we install them here
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| 13:23 | We used "teacher" in the past, but now with the shared folders, we have 1 administrator and many teachers
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| 13:24 | Teachers are used to that name from windows... what can you do :)
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| 13:24 | <markit> with the script I used to migrate users, the already existing grups was not overwrote, so I ended today with "teacher" grup empty, and so "students". I tested only with teacher account past days... shame on me ;P
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| 13:26 | <markit> In the schools here we changed director... previous was totally ignorant about IT and let me do whatever I wanted, more or less (except teacher's complains about their beloved windows). Now the have a new one, I've to meet it yet... all I know is that is a professor of mathematics and uses "ubuntu"
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| 13:26 | but seems not (I googled for him) very found in FOSS
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| 13:27 | so I'm wondering if can do more harm than good, I'll let you know ;P
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| 13:27 | Also I've problems with alsamixer crashing
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| 13:27 | and KDE very slow the first time you enter an empty home... n short, I cross my fingers
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| 13:28 | * markit wasting alkisg time on his pointless rants | |
| 13:29 | <highvoltage> are there any other kind? :)
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| 13:29 | <alkisg> Haha
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| 13:30 | Yesterday I renamed "teacher" to "administrator"... since then pulseaudio kept crashing
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| 13:30 | I found out that ~/.alsarc had the old path to home dir, and aplay + pulseaudio crashed because of that
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| 13:30 | <bieb> alkisg: I have a question for locking down home directories.. I followed the how to and edited /etc/adduser.conf to add dir_mode=0770, but new home dirs created are still getting original chmod giving Other r+w.. any idea what else to look at?
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| 13:31 | <alkisg> bieb: if you're talking about umask, see the ltsp mailing list or try man pam_umask
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| 13:31 | <markit> alkisg: can you rename the user???
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| 13:31 | <alkisg> markit: sure... usermod does everything
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| 13:31 | <piet> @alkisg What Do You mean by But the env vars for fat clients _do_ need to get fixed...
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| 13:32 | <alkisg> piet: it's an upstream issue about LDM_PRINTER_DEFAULT etc
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| 13:32 | That way your jetpipe would just work
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| 13:32 | But now it's a bug for fat clients, and it need to get fixed
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| 13:32 | <markit> alkisg: mmmm big temptation to rename "insegnante" to "administrator" then, I'll do some test
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| 13:33 | alkisg: ehm, will that bug be backported to 12.04?
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| 13:33 | (or whatever bug will be discovered)
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| 13:33 | <alkisg> markit: what bug? About jetpipe and fat clients?
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| 13:33 | No, I don't think so
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| 13:34 | That's why we're maintaining our own ppa
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| 13:34 | Only few bugs ever get backported to older Ubuntu releases...
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| 13:34 | <markit> alkisg: so I could use yours as well? :)
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| 13:34 | <alkisg> If someone wants to file an SRU, test the bug etc, then he has good chances for a backport
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| 13:34 | But it's not something automatic, you need to work on getting the bugs backported
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| 13:35 | markit: sure, we do support hundreds of schools here, so we're very careful of what we put in the PPA
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| 13:35 | But as I said, the LTSP version there cannot cleanly upgrade the 12.04 ltsp version
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| 13:35 | * markit blindly trusts alkisg | |
| 13:36 | <alkisg> You should have added the ppa before installing ltsp
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| 13:36 | Now, you can purge ltsp and reinstall
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| 13:36 | <markit> alkisg: so I just should remove the ltsp stuff and re-install? not a big deal...
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| 13:36 | <alkisg> Or you can spend 10 mins to upgrade the configuration files
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| 13:36 | <markit> ok, I'll test this either... your ppa is...?
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| 13:36 | <alkisg> Yup, just be careful to erase everything ltsp-related, e.g. /var/lib/tftpboot, /etc/ltsp, and /etc/nbd-server
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| 13:36 | !greek-ppa
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| 13:36 | <ltsp> Error: "greek-ppa" is not a valid command.
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| 13:36 | <alkisg> !ppa
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| 13:36 | <ltsp> I do not know about 'ppa', but I do know about these similar topics: 'sbalneav-ppa', 'alkisg-ppa'
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| 13:36 | <alkisg> !alkisg-ppa
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| 13:36 | <ltsp> alkisg-ppa: https://launchpad.net/~ts.sch.gr/+archive/ppa/
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| 13:37 | <alkisg> !forget alkisg-ppa
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| 13:37 | <ltsp> The operation succeeded.
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| 13:37 | <markit> thanks a lot
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| 13:37 | also epoptes will be updated there and not in the "official" repo, I guess
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| 13:38 | <alkisg> !learn greek-schools-ppa as https://launchpad.net/~ts.sch.gr/+archive/ppa/ supports LTS Ubuntu releases with newer LTSP versions, bug fixes etc
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| 13:38 | <ltsp> The operation succeeded.
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| 13:38 | <alkisg> epoptes is updated in its own PPA, and in the greek schools ppa as well
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| 13:38 | One newer version was backported to 12.04, but not all of them will
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| 13:39 | markit: e.g. the greek schools PPA also has a fixed unzip package, which works with windows.zip files that use special characters
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| 13:39 | It affects many languages, maybe it's more rare for italian since you only have a few non-english letters...
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| 13:39 | * markit does not understand the word "Windows" | |
| 13:39 | <alkisg> Well, when your teachers complain that they can't open zip files, you'll understand :D
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| 13:40 | <markit> lol, sure ;P
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| 13:46 | <alkisg> markit: here are the updated packages we ship for precise so far: https://launchpad.net/~ts.sch.gr/+archive/ppa/+packages?field.name_filter=&field.status_filter=published&field.series_filter=precise
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| 13:46 | (we tell teachers not to add other PPAs, so we copy x2go etc from other PPAs into ours)
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| 13:47 | Also, numlockx was broken in precise, so we filed a bug report in debian and then backported the fixed package, etc etc
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| 13:50 | <bieb> alkisg: what is the difference between HomeDirUmask=022 and Dir_Mode=0770? Dirmode is in etc/adduser.conf homedirumask is in the likewise-open registry (for AD authentication)
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| 13:52 | <alkisg> bieb: no idea, I haven't used adduser.conf nor likewise-open... ask in the channel, someone might know
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| 13:53 | <bieb> alkisg: ltsp or ubuntu channel?
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| 13:53 | <alkisg> Maybe ubuntu + likewise channels? Dunno, try and see..
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| 13:54 | <bieb> thanks
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| 15:50 | <sha_> hey guys, is there a definitive guide for nbd-swap and ubuntu 12.04? i just realised that documentation for nbd-swap is completely messed up.
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| 15:56 | man 5 lts.conf talks about default port 9572, i have now changed it to 10809. i specified NBD_SWAP_SERVER though it should work without specifying it. now i'm reading that there is also SWAP_SERVER and SWAP_PORT etc... it just gets more confusing and nothing works
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| 16:23 | <sha_> got it.. i hope
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| 17:17 | <highvoltage> !scotty
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| 17:17 | <ltsp> I do not know about 'scotty', but I do know about these similar topics: 'story', 'socat'
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| 17:18 | <highvoltage> stgraber: do you remember who took the pics of the edubuntu council at bts last year?
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| 17:19 | <Hyperbyte> I have an LTSP client which I configured to do rdesktop
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| 17:20 | When I attach a USB stick, it mounts it in /media/root/<volume name>/ automatically
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| 17:20 | Is this something LTSP or is this something Ubuntu?
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| 17:22 | <stgraber> highvoltage: hmm, nope
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| 17:23 | <highvoltage> mgariepy: didn't you have an issue with usb and rdesktop recently? ^^^
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| 17:25 | <||cw> Hyperbyte: ltsp I think
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| 17:29 | <mgariepy> highvoltage, not really,
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| 17:32 | Hyperbyte, it's ltspfs that mounts the drive in /media/root/<volume name>
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| 17:36 | <PhoenixSTF> hey guys, my Investigation Cientific Center is willing to spend some money on hardware for a LTSP lab and development, I would like to have some recomendations on servers and stuff
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| 17:38 | <||cw> lstp is entirely hardware agnostic. unless your looking for cpu/ram sizing advice, then it depends on the worklaod
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| 17:39 | <PhoenixSTF> that would be a nice advice, for thin and fat clients
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| 17:55 | <||cw> fat clients won't take much server resources. I basically use fat clients, but they only rdesktop. the ltsp server is a 1GB ram 1 vcpu virtual machine and I hardly notice it's there
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| 17:56 | thin clients are going to depend what you run and how many clients. so, it depends
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| 17:57 | some ram sharing will happen with application, but probably not as much as you'd think
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| 18:06 | <vagrantc> ram sharing used to be very effective, but now programs are poorly written :(
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| 18:06 | it started with netscape and staroffice/openoffice/libreoffice and others have caught the bad habits
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| 18:07 | netscape/mozilla/firefox
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| 18:14 | <||cw> wonder how much of that is just how java and XUL work by default
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| 18:14 | XUL is basically interpreted, with lot of javascript. and most of the ram FF uses is for web page code/cache anyway
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| 18:14 | libraries is where most page sharing comes in
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| 18:26 | <PhoenixSTF> Ok so any well loaded pc and memory will do the job
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| 18:27 | obviously server dedicated hardware is more efficient then desktop hardware, but does it pays off?
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| 18:44 | <||cw> efficient, maybe not, but reliable, yes
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| 18:45 | design more rigorous, QC process more strict, resulting in higher MTBF ratings
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| 18:54 | might be useful to start with hardware you have, or run a server in vbox on a desktop, with a few clients and get a feel for how it's going to scale.
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| 18:55 | hadrware these days is cheap enough that overkill likely won't be too expensive, but under doing it will be starting over, and that can be expensive
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| 19:25 | <PhoenixSTF> ||cw, ty for the tips ;)
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| 19:25 | gota go
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| 19:25 | cya
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