IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 7 September 2015 (all times are UTC)
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| 02:42 | <fnurl> so hey I don't wanna spam a quiet channel
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| 02:42 | I asked last friday - but no one was able to help
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| 02:42 | my issue is thin client printing on Pinet/LTSP/Chroot/CUPS
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| 02:42 | at the moment, the ubuntu host can see the network printer and print
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| 02:42 | the thin clients can't see the printer, and I can't log into the chroot install of CUPS
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| 02:42 | I added root to lpadmin, but I still can't log in at the moment, the ubuntu host can see the network printer and print
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| 02:42 | I added root to lpadmin, but I still can't log in
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| 02:43 | oops sent twice :/
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| 03:30 | <fnurl> so hey I don't wanna spam a quiet channel
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| 03:30 | I asked last friday - but no one was able to help
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| 03:30 | my issue is thin client printing on Pinet/LTSP/Chroot/CUPS
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| 03:31 | at the moment, the ubuntu host can see the network printer and print
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| 03:31 | the thin clients can't see the printer, and I can't log into the chroot install of CUPS
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| 03:31 | I added root to lpadmin, but I still can't log in at the moment, the ubuntu host can see the network printer and print
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| 03:36 | <work_alkisg> fnurl: thin client printing is not done with CUPS but with jetpipe, PRINTER_x= in lts.conf
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| 03:36 | work_alkisg is now known as alkisg | |
| 03:47 | <fnurl> thanks alkisg
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| 03:47 | i saw a mention of jetpipe elsewhere
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| 03:48 | <alkisg> !lts.conf
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| 03:48 | <ltsp> lts.conf: (#1) http://manpages.ubuntu.com/lts.conf, or (#2) lts.conf manpage is available in the ltsp-docs package
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| 03:48 | <fnurl> is that for local or network printers, or is that not an issue
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| 03:48 | <alkisg> Not an issue. Only ltsp fat clients and the ltsp server use cups
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| 03:48 | <fnurl> excellent!
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| 03:48 | <fnurl> much appreciated bud, I'll report back with a result
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| 04:01 | <alkisg> fnurl: note that when you log in to a thin client, you're working on the server, so it's the server that's supposed to use CUPS and see the network printer
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| 04:01 | PRINTER_x in lts.conf is for local printers connected to the thin clients themselves
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| 04:02 | <fnurl> yeah - i was confused about why I would need a second install of CUPS, I assumed the cups in the jail was needed to relay to the CUPS on the server
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| 04:02 | i just uninstalled CUPS and rebuilt image, about to look up the process to install/config jetpipe
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| 04:09 | <alkisg> fnurl: you don't need jetpipe to access a network printer from a thin client session
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| 04:09 | You only need it if the printer is not a network one, but e.g. a usb one connected to the thin client
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| 04:23 | <fnurl> oh
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| 04:23 | sorry - was afk (lunch time here)
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| 07:01 | <muppis> Morning.
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| 07:01 | !dvd
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| 07:01 | <ltsp> I do not know about 'dvd', but I do know about these similar topics: 'docs', 'dhcpd', 'dhcp'
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| 07:02 | <muppis> Any suggested approach to dvd replay on thin client?
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| 07:03 | <shogunx_> i would not approach the user trying that. i would run away as fast as possible.
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| 07:03 | <vmlintu> Years ago I did it by mounting the dvd as a data disk and then opening the files with vlc
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| 07:05 | <muppis> It mounts as data disk (as already being one), but mountpoint at server is not available on client.
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| 07:07 | So how I make same mountpoint visible to client or do I write a script make it point directly to /dev/sr0 ?
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| 07:09 | I think I write a script.
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| 07:13 | <vmlintu> Is the dvd drive on the client or on the server?
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| 07:13 | <muppis> On the client.
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| 07:28 | <vmlintu> It was ages ago, but I remember that working without any hacks..
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| 07:28 | <muppis> That would be nice.
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| 07:43 | ltsp-localapps vlc /dev/sr0 starts the video. Now only thing is how make it user friendly.
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| 07:43 | <fnurl> so hey, I was asking earlier about thin client printing, and i still haven't nailed it
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| 07:44 | i'm starting to think we should deploy an edubuntu instead
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| 07:44 | <muppis> Printing from client or to client?
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| 07:44 | <fnurl> where we have a (newly purchased) router, and it hands out 10/20 fixed IP addresses, will that be a problem if the edubuntu is in DHCP role
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| 07:45 | muppis: printing from the thin clients
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| 07:45 | <alkisg> fnurl: can you print to your network printer from the ltsp server?
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| 07:45 | I.e. if you log in directly on the server?
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| 07:45 | If not, you just haven't set up the printer, it's not an ltsp issue
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| 07:45 | <fnurl> oh hay alkisg, sorry I thought you'd afk'd
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| 07:45 | yeah, the printer is setup in ubuntu
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| 07:46 | <alkisg> So you can print from the server?
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| 07:46 | <fnurl> just the thin clients/raspberry pi's cant see it
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| 07:46 | yep - can print from the server
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| 07:46 | the LTSP is based on pinet if that makes a difference
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| 07:46 | <alkisg> It doesn't make a difference, but what you're saying doesn't make much sence,
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| 07:46 | are you sure that you're using the pi's as thin clients and not as fat clients?
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| 07:47 | If you open a terminal in a pi client, do you see user@server or user@ltsp123 ?
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| 07:47 | <fnurl> 1s lemme check
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| 07:47 | apologies for lack of clarity
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| 07:49 | http://imgur.com/zaBJjSI
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| 07:50 | <vmlintu> muppis: I'd really recommend fatclients if you want to make them work nicely..
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| 07:50 | <fnurl> i'm using epoptes to access the thin client, the account doesn't have sudo permission
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| 07:50 | vmlintu: we've invested in 10 raspberry pi
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| 07:50 | <muppis> vmlintu, lack of RAM forces to use thins.
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| 07:50 | <fnurl> but yeah, i'm thinking that edubuntu might be easier to work with
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| 07:51 | the previous machines are XP, and the server is 2003, so it's all EOL
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| 07:51 | the new server is a qnap NAS, and the ubuntu is a VM
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| 07:52 | <alkisg> fnurl: you're using the pi's as fat clients
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| 07:52 | <fnurl> ahhhhhhhh!
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| 07:52 | <alkisg> Why do you think edubuntu is not the same as ltsp?
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| 07:52 | <fnurl> i just reread your question
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| 07:52 | <alkisg> !cups
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| 07:52 | <ltsp> cups: Recent cups versions have issues with the hostname, either set 'ServerAlias server' in <server>/etc/cups/cupsd.conf, or 'CUPS_SERVER="$SERVER"' in lts.conf so that it's accessed by its ip
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| 07:52 | <fnurl> i assumed the pinet was a customized LTSP
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| 07:52 | <alkisg> Put this line in your lts.conf:
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| 07:53 | CUPS_SERVER="$SERVER"
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| 07:53 | <fnurl> if you have fixed this issue, i will forever be in your debt, afterlife included
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| 07:53 | <alkisg> AFAIK, pinet is a few scripts that try to help people install LTSP on pi. I don't know if they do a good job at that, but upstream LTSP is what makes it running, it's not a fork.
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| 07:54 | Haha, no please, even my wife said "till death do us apart", I want no obligations for the afterlife :D
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| 07:54 | <fnurl> http://imgur.com/qA4N24P
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| 07:55 | ^^ thats the lts.conf as I see it
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| 07:55 | <alkisg> Right, add the line that I said, and also enable printer sharing in your server cups' options
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| 07:55 | <fnurl> i can chmod that to 777, insert the line, then chmod it back to 755, and it's all good ??
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| 07:55 | <alkisg> http://cdn.makeuseof.com/wp-content/uploads/2014/10/muo-piprint-cups-share.png?fa45c6
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| 07:56 | <fnurl> sharing is enabled in cups
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| 07:56 | <alkisg> ...why chmod?
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| 07:56 | sudo nano /var/lib/tftpboot/ltsp/<arch>/lts.conf
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| 07:56 | <fnurl> nano says no write permission
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| 07:57 | <alkisg> Did you put sudo in front of it?
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| 07:57 | <muppis> !vlc
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| 07:57 | <ltsp> I do not know about 'vlc', but I do know about these similar topics: 'ver', 'vga', 'v'
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| 07:59 | <fnurl> alkisg: dw, just me i think
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| 07:59 | http://imgur.com/sexhMc1
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| 07:59 | <alkisg> Save, reboot the pi and check
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| 08:00 | <fnurl> last question -i don't need to change the fat_client=true?
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| 08:00 | http://imgur.com/BRgYTPP
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| 08:00 | sorry, couldn't see in that pic
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| 08:01 | but yeah, i'm remote at the minute, I'm gonna re-do the image etc, will be able to report back in 20 minutes, the headmaster is collecting students at the moment
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| 08:05 | http://imgur.com/v4FRCmz http://imgur.com/TtLCZSu
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| 08:05 | updating image now, thanks v much for your help, lifelong debt or otherwise :)
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| 08:11 | <alkisg> fnurl: you shouldn't be using /opt/ltsp/armhf/etc/lts.conf, but /var/lib/tftpboot/ltsp/armhf/lts.conf
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| 08:11 | So that you don't need to run ltsp-update-image every time you update lts.conf
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| 08:12 | <fnurl> ahhhh, that's awesome to know
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| 08:12 | because yeah, updating the image and switching cards, is getting a little long-in-the-tooth
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| 08:13 | now that i've done it this way it's good to go though, I'll switch the line to the var/.../ later on
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| 08:13 | <muppis> vmlintu, I made special vlc.desktop which launches vlc as localapp.
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| 08:31 | <fnurl> alkisg: you sire are a hero, the printer is now shoing up on the thin client
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| 08:31 | <alkisg> Cool, but don't say "thin client", it's a "fat client"
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| 08:31 | <fnurl> but I just noticed, when epoptes starts, it identifies the pi as FAT
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| 08:32 | <alkisg> It messes up the instructions that we give here
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| 08:32 | If you ask instructions for thin clients, they're different than fat clients
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| 08:32 | <fnurl> yeah, i can understand that
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| 08:32 | sorry, but yeah, i think you identified that as the issue immediately, much appreciated
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| 08:33 | <alkisg> Well, I did give you instructions 2 days ago as well, but they were for thin clients
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| 08:33 | <fnurl> if I changed http://imgur.com/BRgYTPP <--- that line to read LTSP_FATCLIENT=FALSE, would it be that easy?
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| 08:34 | apols, was that on friday?
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| 08:34 | <alkisg> That would make your clients thin clients. Then they would run on the server CPU, and automatically see the server printers
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| 08:34 | And of course it would strain your server CPU and local network
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| 08:35 | <fnurl> overhead & strain isn't a huge concern
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| 08:35 | <alkisg> !flash
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| 08:35 | <ltsp> flash: Yes, flash sucks. An HD full screen 30 fps video needs 2.5 Gbps bandwidth (1920×1080×4×30)! Make sure you have LDM_DIRECTX=True in your lts.conf file, or if it's just youtube you're after, try some flash replacing plugin like http://linterna-magica.nongnu.org
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| 08:36 | <alkisg> Anyway you can test both LTSP_FATCLIENT=True/False and see what works better in your environment
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| 08:36 | Without spending time to understand the theory behind it...
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| 08:36 | <fnurl> flash is a thing I was planning on dealing with next
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| 08:37 | <alkisg> It's not just about flash, thin clients put a big strain on the local network. If it's all gigabit, it's usually acceptable though.
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| 08:37 | <fnurl> the network has been upgraded to Gb/E, and the NAS is only holding this ubuntu VM and general storage
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| 08:38 | i'd like to think i understand most of the theory behind LTSP, but, i must admit, i honestly thought the pinet would be set to thin out of the box, so to speak
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| 08:38 | bad assumption on my part
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| 08:38 | but, thanks very much for your help today, it's very very much appreciated
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| 08:39 | 90~ kids, 10 teachers, and 1 me owe you a favour :)
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| 08:39 | <alkisg> You're welcome, you're the 100th school that I've helped since 1st of September :D
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| 08:40 | <fnurl> seriously!
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| 08:40 | <alkisg> http://www.ltsp.org/stories/widget-map/?location=Greece
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| 08:40 | <fnurl> in 6 days, that's very very impressive
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| 08:40 | * alkisg is a remote sysadmin for these schools... | |
| 08:40 | <fnurl> ahhh, k
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| 08:40 | <alkisg> Kids here come at 10th of september
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| 08:40 | So from 1 to 10th the teachers maintain their pc labs
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| 08:41 | <fnurl> no doubt
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| 08:41 | this isn't my school, the guy who owns/runs it is a friend
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| 08:42 | he asked for help planning an upgrade, getting on windows was key as was affordability (a story you've heard no doubt)
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| 08:42 | on // off :/
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| 08:43 | * alkisg doesn't like pi's much though, their CPUs are very low spec'ed | |
| 08:44 | <fnurl> yeah, i'm the same - i think they're suitable for little kids libraries and so on though
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| 08:44 | or actually very limited classroom activities
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| 08:44 | <alkisg> No, because they need web browsing + multimedia, and pi's are not good for that...
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| 08:44 | <fnurl> for my part, since I started looking at this, I'm wanting to deploy an LTSP of my own
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| 08:44 | <alkisg> I think they're only good for text editors, programming, and maybe watching a movie if acceleration is working...
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| 08:45 | <fnurl> that makes sense, I pulled off the minecraft installation, and the scratch installation too
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| 08:46 | i'm not sure the headmaster wants too much in the way of web browsing anywhere in the school
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| 08:47 | i'll be writing up a case study for this school as it is, i'll submit it to the LTSP stories
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