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


Channel log from 18 September 2013   (all times are UTC)

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00:19
<todd>
Hey all! Is there a PDF for LTSP 5 hanging around somewhere? I've found the manpages, but I'm looking for something like what used to exist for LTSP4 (which I can't seem to download from sourceforge) that explains the concepts.
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08:25
<zend>
Hi! :-) How can i enable network printer installed on ltsp server for thin client's local apps ? :-)
08:28
Scheme like these: <Network printer> - <LTSP Server> - <Thin Client> - <Local application>
08:30
With applications, which running directly on ltsp server, all ok, they are seeing the printer. But local apps does not.
08:34work_alkisg is now known as alkisg
08:37
<Hyperbyte>
zend, I think it's a matter of just configuring CUPS on the server to share the printer.
08:40
<zend>
Printer is set as shared for all users
08:40
In CUPS
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09:46
<zend>
So, nobody can help me? :-[
09:47
<alkisg>
It should be working by default... so you need troubleshooting...
09:47
<zend>
I am trying to install cupsd in the thin client's chroot, but (i guess) ltsp removes cupsd startup scripts from thin clients
09:48
<alkisg>
You don't need cupsd, just the client part
09:48
I.e. cups-client
09:48
Just enough to point the client to the server (CUPS_SERVER=server, the default)
09:49
<zend>
cups-client is installed :(
09:49
<alkisg>
"so you need troubleshooting..." :)
09:49
<zend>
Heh...
09:49* alkisg is kinda busy currently though... wait a bit more in case someone's free
09:51
<Hyperbyte>
zend, the problem here is... it should work out of the box.
09:51
Without trying to be rude, you have probably done something to break it, or misconfigured the cupsd printer sharing on the server.
09:54
<zend>
It is a fresh install...
09:54
:-)
09:55
This problem is only with applications, which running as "localapps"
09:55
For other applications and users printer is visible
09:55
<Hyperbyte>
That's because other applications run on the server, and use cupsd on the server directly
09:56
<zend>
Yes, i understand it)
09:56
<Hyperbyte>
The localapps rely on local cups client
09:56
<zend>
How i can check the local cups client?
09:59* Hyperbyte shrugs
09:59
<Hyperbyte>
I do not know.
09:59
<zend>
:'(
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10:09
<Hyperbyte>
zend, wait around for alkisg or someone else who knows. ;-)
10:10
<zend>
I see that file /etc/cups/client.conf is does not exist
10:10
On thin clients
10:12
<Hyperbyte>
zend, put your lts.conf on pastebin.
10:13
<zend>
One moment
10:13
<Hyperbyte>
Which OS are you using?
10:13
What distro/version?
10:15
<zend>
http://pastebin.com/fJkR0GXf
10:15
xUbuntu 13.04
10:15
i386
10:15
Xubuntu :-)
10:15
<Hyperbyte>
You don't need LIKE=Default
10:16
You also don't need FAT_CLIENT=False
10:16
Wait, this is regular LTSP, right?
10:17
Where did you get your config ideas from?
10:17
Things like NETWORK_COMPRESSION?
10:18
<zend>
Hmm... About the compression - i see it in manual on ubuntu's wiki :-)
10:18
http://manpages.ubuntu.com/manpages/natty/man5/lts.conf.5.html
10:19
But...
10:19
Yes, i don't see this variable in man from present version
10:19
<Hyperbyte>
'natty' - you're viewing 11.04 docs
10:19
!lts.conf
10:19
<ltsp>
lts.conf: http://manpages.ubuntu.com/lts.conf
10:19
<Hyperbyte>
Use that manpage.
10:19
NETWORK_COMPRESSION = LDM_DIRECTX in newer versions, use that
10:20
If you value performance over security, that is.
10:20
<zend>
Ok, i'll try it right now :)
10:20
<Hyperbyte>
So change that, remove the two lines I mentioned.
10:22
Also things like LOCALDEV=True LOCAL_APPS=True are true by default, you don't need them.
10:22
MOUNT_LOCAL_MEDIA - I don't see this option in current manpage. Why did you specify this? Do your clients need to use the local harddisks?
10:24
<zend>
They need to use usb flash drives :)
10:24
<Hyperbyte>
Right, LTSP mounts USB drives by default.
10:25
So remove MOUNT_LOCAL_MEDIA
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10:25
<Hyperbyte>
When you've made all above changes, pastebin your new lts.conf and let me take another look. :)
10:25
<zend>
Ok!
10:26
<Hyperbyte>
Not sure if this actually solves your problems, but it's a good place to start. If your installation -is- fresh and unmodified as you say, then it should work, unless something in lts.conf is wrong or something went wrong with the installation. 2nd part we'll debug next.
10:28
<zend>
http://pastebin.com/5CRRsuRu
10:29
<Hyperbyte>
Remove LOCALDEV=True also, that's default value.
10:29
<zend>
My fault. Removed.
10:29
<Hyperbyte>
Next step is reboot client, see if this fixes the problem. My guess is no, but let's see.
10:32
<zend>
ok
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10:32
<zend>
Still does not see the printer, but!
10:32
But...
10:33
But now i see the client.conf in cups directory
10:33
With ServerName server
10:33
Wow)
10:33
That's wrong
10:33
<Hyperbyte>
No, that's not.
10:33
Type 'ping server' :)
10:34
<zend>
Yes, it resolv it...
10:34
OK..
10:34
<Hyperbyte>
:)
10:34
You are running a local xterm to check all this, I assume?
10:34
Or a root shell or screen_02?
10:34
<zend>
Yes
10:34
Of course)
10:34
<Hyperbyte>
local xterm, okay
10:35
<zend>
Look..
10:35
<Hyperbyte>
Type: dpkg -l cups-client | grep ^ii
10:35
(in the local xterm)
10:35
<zend>
Yes, it is installed
10:36
<Hyperbyte>
Not sure about the rest of the workings of cups-client. But I'm sure with everything we've determined now, alkisg will know the answer in 1 minute.
10:36
<zend>
After changing servername to ltsp.mydomain i see the printer in libreoffice :-\
10:36
:-\
10:36
<Hyperbyte>
zend, hrm
10:37
Put:
10:37
LDM_SERVER=ltsp.mydomain in your lts.conf
10:37
Retry
10:37
<zend>
Changed back to "server", and printer disappears :)
10:38
One moment, i'll try.
10:38
<Hyperbyte>
Although
10:38
No, go ahead and try.
10:39
Well, no, let's take simpler approach anyway
10:39
Don't put LDM_SERVER
10:39
Put CUPS_SERVER instead
10:39
<zend>
Ok )
10:39
Changed, booting...
10:40
But i don't see the CUPS_SERVER variable in man :)
10:40
<Hyperbyte>
That's a problem with documentation.
10:40
<zend>
Anyway, booting
10:40
)
10:41
<Hyperbyte>
If you're a technical person, take a look in /opt/ltsp/i386/usr/share/ldm/rc.d/X01-localapps on the server
10:41
At the complete bottom, there's logic for creating the cups/client.conf file
10:41
<zend>
One moment
10:42
<Hyperbyte>
It puts LDM_SERVER as ServerName, unless CUPS_SERVER is set, because then it takes CUPS_SERVER.
10:44
<zend>
Yes, i see..
10:44
Cool )
10:45
It's working now :)
10:46
Yes
10:46
Thank you!!! :-)
10:47
You really helped me!
10:48
<Hyperbyte>
Wow! :-)
10:49
Glad I could help.
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10:54
<Hyperbyte>
Oh!
10:54
!map
10:54
<ltsp>
I do not know about 'map', but I do know about these similar topics: 'worldmap'
10:54
<Hyperbyte>
!worldmap
10:54
<ltsp>
worldmap: If you're using LTSP, please let the world know and share your story at http://www.ltsp.org/stories/ Your can add a nice pin to our world map at your location, plus your setup will count towards the global LTSP usage statistics.
10:54
<Hyperbyte>
Don't forget. :-D
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12:17
<willianmazzardo>
alkisg, good morning … (to me ) eheheh
12:18
alkisg, about the issues talked yesterdey … everything is OK … but one thing I feel strange is the CUPS, he is not LOCAL, the clients are using cups for server … but is working
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13:47
<Hyperbyte>
willianmazzardo, LTSP clients always use the CUPS on the server. That way you don't have to mess with client config to configure a printer.
13:47
<willianmazzardo>
Hyperbyte, in FAT clients
13:48
<Hyperbyte>
willianmazzardo, same story I think.
13:53
<willianmazzardo>
ok
13:53
<Hyperbyte>
Is it a problem for you?
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14:12
<alkisg>
willianmazzardo: hi, yup, it's like Hyperbyte said it
14:13
CUPS_SERVER=server by default
14:13
<willianmazzardo>
ok
14:13
;)
14:19
<Hyperbyte>
Oh, HIM you believe....
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14:52
<tfdl>
hello again,
14:53
in a default ltsp thin client server setup. a user can not open 2 firefox browser on 2 different login/client machines.
14:54
So, i think of installing firefox as local app so that one same user can open more than 1 firefox browser on different computer at the same time.
14:55
is this correct, can you please confirm?
14:56
thanks all!
14:56
<alkisg>
Will /home/username be common to those machines?
14:56
E.g. via sshfs, or nfs?
14:56
If so, it will still be a problem with firefox, and you shouldn't do that in general...
14:58
<tfdl>
testing
14:59
ok able to type now
14:59
sorry
14:59
ah /home/user1 is the only dir
14:59
the chat does not accept string start with /home/user1 :)
15:01
ok, i will not do that local app for firefox. it is because we have like 100 clients machines doing the same thing, so we do not want to create and admin 100 users.
15:02
alkisg, i asked you a related question before and you told me to user skel as template profile which works nicely for us
15:03
but this time we question further to only create 1 user. but now i know it is not a good idea.
15:03
thanks again.
15:05
here is our library btw, http://tfdl.ucalgary.ca/
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15:14
<alkisg>
tfdl: is that like a kiosk, where the user doesn't save any data at all? If so, you can have 1 user...
15:15
I.e. each user would use some NBD space from the server, he wouldn't use SSHFS nor NFS
15:18
<tfdl>
sorry
15:18
yes
15:19
we use firefox as kios
15:19
ok
15:20
so back to my question alkisg, i need to install firefox as localapps?
15:21
you are right that user does not save data at all
15:22
we play workroom booking application on it.
15:22
one app is open source php the other is outlook they are both webapps that is why we need firefox
15:23
as kiosk
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15:28
<tfdl>
so alkisg, i still need to install localapps firefox and rebuild the client image?
15:32
<alkisg>
tfdl: how much RAM do the clients have?
15:32
<tfdl>
2 gig
15:33
<alkisg>
Yes, install firefox as localapp, you don't need any server user at all, only the kioskuser created dynamically on boot will suffice,
15:33
and an NBD temporary /home/kioskuser locally, and you're ready to go
15:33
<tfdl>
here is our computers http://www.viaembedded.com/en/products/systems/990/1/AMOS-5000_(EITX-3000).html
15:34
<alkisg>
This isn't a computer; it's just the chassis
15:34
<tfdl>
that is so neat
15:34
<alkisg>
It doesn't say anything about the specs of your clients... but ok, the 2 gigs you said is enough...
15:35
<tfdl>
ok, sorry it is chassis, ok, i will go do it now.
15:35
thanks for today solution and task. (ltsp daily dose)
15:38
alkisg, is this the page to read? https://help.ubuntu.com/community/UbuntuLTSP/GetMoreFromLocalApps#A10.04
15:39
<alkisg>
Tha page is extermely outdated, it should be deleted...
15:39
*That
15:39
<tfdl>
but i am so in need of some doc
15:40
instruction
15:40
can you point me to another page?
15:41
<alkisg>
I don't think that method is documented anywhere... maybe you could find some old conversations in irclogs.ltsp.org
15:41
<tfdl>
ok thanks!
15:43
thanks alkisg, will figure it out.
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16:07
<tfdl>
this will probably help install firefox as localapps https://www.youtube.com/watch?v=WFSF_Vqq7_I (just want a record for this conversation log, for other user).
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16:14
<alkisg>
tfdl: you're not looking for localapps, but for the kiosk mode
16:15
(if I understood correctly...)
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16:23
<cliebow>
anyone figured out how to netboot a macbook to isc dhcp?
16:28
<workingcats>
cliebow, what do you mean?
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16:34
<tfdl>
alkisg, ok i will try both. to see what will allow me to open multiple ffox on different machine with just 1 account. thanks tahanks!
16:36
<workingcats>
tfdl, another option would be to use different FF profiles, but i dont think it fits this case well
16:39
<cliebow>
workingcats, i was deep into using ibooks and g4 as clients back in the ice ages..wonder if anyone else is carrying the ball for macbooks..
16:40
i never did get a working config for macbooksd as clients
16:40
<workingcats>
assuming they implement the basic functionality of PXE i dont see why it wouldnt work?
16:40
<cliebow>
they dont
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16:40
<cliebow>
really
16:40
<workingcats>
lol, that is so apple
16:40
<cliebow>
hey Vagrant!
16:40
<workingcats>
well you can "chain-boot"
16:41
like on the rPi. load a bootloader local that is capable of handing over to network boot
16:41
<cliebow>
i ll ask the guys when they come to ltsp by the sea
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16:43
<vagrantc>
cliebow: hi!
16:44* vagrantc needs to make plans for bts soon, it's coming fast!
16:45
<cliebow>
8~)..i forgot when already..first week or so of Oct.
16:45
<vagrantc>
last week of oct, no?
16:45
workingcats: what's the question?
16:45
<cliebow>
have to get hold of jammcq..havnt seen anything of Scotty
16:46
<workingcats>
vagrantc, netboot macbooks
16:46
<vagrantc>
i've had some success with netbooting macbooks
16:46
ppc is easier...
16:47
<cliebow>
we can netboot and image macbooks here..guess ill have to capture the conversation again..
16:47
<vagrantc>
sometimes you can use an iPXE boot CD or USB stick to just get pxelinux
16:47
<cliebow>
but of coursed that is to apple dhcp
16:47
ahh yes
16:47
<vagrantc>
i've got x86 macs booting off a linux server
16:47
but only to OSX
16:47
<workingcats>
the dhcp server only supplies the path, the actual boot files should be via some other method, e.g. tftp, no?
16:47
<cliebow>
anythong special for commands in dhcpd.conf
16:48
<vagrantc>
iPXE works in most of the other cases
16:48
<workingcats>
vagrantc, yeah thats what i meant with chain boot :)
16:48
<vagrantc>
workingcats: mac combined them all into a single server
16:48
<workingcats>
lol
16:48
<vagrantc>
wat i'd really like to do is boot iPXE over the network
16:49
<cliebow>
so you ve got a working dhcpd.conf to boot from a linux box then?
16:49
<vagrantc>
works fine on normal x86 machines, but haven't had luck making an iPXE UEFI image
16:50
cliebow: yup
16:50
cliebow: also needs netatalk (yes, netatalk)
16:50
<cliebow>
hahah..stab from the past
16:51
<vagrantc>
nothing like protocols of the 80s used to boot fairly modrn hardware
16:51
<workingcats>
well i'm off for now, laters
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16:52
<cliebow>
so fool it into thinking iot is talking to a mac server
16:52
<vagrantc>
yeah, it uses appletalk to authenticate and provide "swap" files
16:53* vagrantc tightens the screws on the skull and squints
16:53
<cliebow>
hehehe
16:53
<vagrantc>
cliebow: i need to write up what i've done efore i forget
16:53
<cliebow>
firghto.. ill wait..
16:54
<vagrantc>
it's been a while since i've tried wrapping iPXE in an EFI image... might work better now
16:54
doesn't help that apple's EFI isn't compliant with other implementations...
16:56
<cliebow>
yes
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18:40
<edwin>
I have a novice question
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18:41
<Guest57090>
oook
18:41
so I still have the question
18:41
<muppis>
Just ask.
18:41
<Guest57090>
if I have a 64 bits LTSP Server
18:42
and the thin clients are 32 bits. Will they use the server whole capabilitie or just part of it?
18:42
<muppis>
Whole. It's just a terminal to use that server.
18:43
<Guest57090>
but I will have to build for archi686
18:43
<vagrantc>
theapplications actually run on the server, unless you tell them not to (i.e. fatclients)
18:43
but they do use local gpu rather than server gpu
18:43
<Guest57090>
ltsp-build-image --archi686 right?
18:44
<vagrantc>
if your distro has i686 as a valid arch..
18:44
debian/ubuntu use i386
18:44
<Guest57090>
let me get this text hold on
18:45
Warning /!\ If you are on a 64-bit system but your clients have another architecture use the --arch option eg. sudo ltsp-build-client --arch i386
18:48
thats from https://help.ubuntu.com/community/UbuntuLTSP/LTSPQuickInstall
18:50
<vagrantc>
sure
18:51
Guest57090: if you're on ubuntu and you have 32-bit clients, use --arch i386
18:55
<Guest57090>
so thats my question
18:55
will that client use the whole capacity of the service beeing a 32 bits?
18:56
let's say I have 8 Gb Ram
18:56
server*
18:57
<alkisg>
Yes. The client will do a "remote desktop" on the server, so then the programs will be running on the server, which will have access to all the 8 Gb RAM
18:58
By the way, even i386 clients can access up to 64 Gb RAM, it's a feature called PAE
18:58
<Guest57090>
opps didn't know that I thought it was only to 3.6 aprox
18:59
<alkisg>
A default i386 ubuntu installation can see up to 64 Gb RAM
18:59
because it uses the -pae kernel
19:00
<Guest57090>
man this channel rockssss, Thanks everybody
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19:06
<vagrantc>
although if you can use amd64/x86_64, it accesses the higher ram a little more efficiently
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