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


Channel log from 15 November 2017   (all times are UTC)

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11:36
<estefania_>
dfdf
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12:28
<fzimper>
Hi. I struggle to get a locally connected USB printer to work on a fat client. Any hints where to start?
12:29
It doesn't show up in CUPS on the localhost without adding it. Nor is it listed in the printer configuration of the system settings
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15:55
<fzimper>
re my printer problem: I put CUPS_SERVER=localhost in my lts.conf. On the client, this resulted in a client.conf containing 'ServerName ::1'.
15:58
Looks like something did a reverse DNS resolve using IPv6, which caused an issue with my CUPS server on the fat client. I changed it to 'CUPS_SERVER=127.0.0.1' in lts.conf and now it works
15:59
<vagrantc>
ltsp hasn't been well tested with ipv6...
16:04
<fzimper>
I never intended to use it. But my "localhost" was resolved to "::1"
16:05
<vagrantc>
what distro?
16:05
<fzimper>
Ubuntu 16.04
16:05
<vagrantc>
are you using the ltsp ppa, or packages from 16.04?
16:05
!ppa
16:05
<ltsp>
I do not know about 'ppa', but I do know about these similar topics: 'sbalneav-ppa', 'greek-schools-ppa'
16:06
<vagrantc>
!greek-schools-ppa | echo fzimper
16:06
<ltsp>
fzimper greek-schools-ppa: https://launchpad.net/~ts.sch.gr/+archive/ppa/ supports LTS Ubuntu releases with newer LTSP versions, bug fixes etc
16:06
<fzimper>
I use the ppa
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16:32
<alkisg>
fzimper: in general, you forward the printers to the server via jetpipe, and install them on the server, using the default CUPS_SERVER=server
16:32
!jetpipe
16:32
<ltsp>
jetpipe: (#1) Jetpipe -script has founded to be unstable in some cases. You can try C written (but limited) Jetpipe from GitHub https://github.com/bilange/jetpipe or switch it to USB/IP and use these scripts http://pastebin.com/Ltdi2TCL Support AIO devices as well., or (#2) jetpipe has a bug in some Ubuntu versions, to manually start it, put something like this in lts.conf: RCFILE_01="/usr/sbin/jetpipe /dev/usb/lp0 9100 &"
16:32
<alkisg>
!printer
16:32
<ltsp>
printer: Quick how-to: RCFILE_01="/usr/sbin/jetpipe /dev/usb/lp0 9100 &" in lts.conf, reboot client, then go to server's add printer dialog, and specify network printer → jetdirect → ltsp123.local
16:32
<alkisg>
!printers
16:32
<ltsp>
I do not know about 'printers', but I do know about these similar topics: 'fatclient-printers'
16:32
<alkisg>
!fatclient-printers
16:32
<ltsp>
fatclient-printers: You can publish printers on your network so that fat clients see them, by launching "system-config-printer" and selecting Server → Settings → Publish shared printers connected to this system
16:34
<fzimper>
Yes, that's what we had used. But as the printer in our computer lab only has a USB port, I connected it to a raspberry pi. So if a user prints from a PC, the file is first printed to CUPS on the server and from there it ges to CUPS on the raspberry pi which then prints it via USB
16:36
And that is quite slow for big files. Never been a problem for me but one of my colleagues was complaining because he often wants to print some graphic-heavy documents "quickly" before heading to the next lesson. "And that was possible before when we had Windows" - Obviously that was not quicker because of Windows, but because the printer was connected locally.
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16:47
<JuJUBee>
How do I grant users access (rw) to the local HD?
17:00
<alkisg>
fzimper: "from there it ges to CUPS on the raspberry pi " ==> in what I described, cups isn't used at all on the fat clients
17:00
!local
17:00
<ltsp>
I do not know about 'local', but I do know about these similar topics: 'install-localapp', 'localdev', 'RDP-localdev', 'LocaldevCommonGroupWorkaround', 'localxterm', 'local-disks', 'local-boot', 'localapps'
17:00
<alkisg>
!local-disks
17:00
<ltsp>
local-disks: On fat clients, only sudoers have access to local disks. One way to give access to non sudoers, is to put in lts.conf: RCFILE_01="mkdir -p /media/local_disk && mount /dev/sda1 /media/local_disk"
17:00
<alkisg>
JuJUBee: ^
17:01
<JuJUBee>
alkisg, thanks. I am using fat clients
17:02
DO I still need LOCALDEV=true and LOCALDEV_DENY_INTERNAL_DISKS = false ?
17:02
<fzimper>
alkisg: Yep, CUPS is not used on the fat client. But on the server and on the pi.
17:03
<alkisg>
JuJUBee: no, only the RCFILE_01 that I pasted is needed
17:03
fzimper: the pi is a fat client and cups isn't used there as I described
17:03
<JuJUBee>
Will that dir persist?
17:03
<alkisg>
JuJUBee: that dir is a mount point created dynamically on boot. The content will persist as it's local storage, the mount point will be recreated on next boot.
17:04
<JuJUBee>
thanks, that is what I meant. Great
17:04
<alkisg>
np
17:04
<fzimper>
No. The fat client is a standard PC which prints to CUPS on the LTSP server. The printer is connected to the rasperry pi and configured as a network printer on the LTSP server
17:04
The pi just acts as a print server in that case.
17:04
<alkisg>
fzimper: in ltsp terminology, "fat client" is a diskless client netbooted from the ltsp server
17:04
<fzimper>
Yep.
17:04
<alkisg>
That's what pi is
17:05
So, pi is a fat client
17:05
Then, pi is supposed to be running jetpipe to forward the usb printer to the server
17:05
No cups involved at all
17:05
<fzimper>
And the Pi is booted from its very own SD card. It's been there already when I installed the LTSP network
17:05
<alkisg>
If pi is a standalone client and not a pi client, then you could use jetpipe the same way there, if you wanted to speed up things
17:05
*not an ltsp client
17:06
<fzimper>
Ok, never head of jetpipe. Will have a look at that
17:06
<alkisg>
It's the standard printing method for ltsp, since 10 years or so...
17:07
Also, sd cards wear out after a while, so if you already have an ltsp server, you could use it to netboot the pi... if it suits your use case that is
17:08
<fzimper>
Understood. But currently it's not worth the effort for me. I have a recent backup of the SD card and can quickly restore it if need be.
17:09
So is this still current and also valid for fat clients (or standalone devices such as the pi)? http://wiki.ltsp.org/wiki/Tips_and_Tricks/Devices#Printer
17:10
<alkisg>
Eh, it is, although the factoids I used above ^ are better
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21:12
<BillLong>
Does anybody know any ltsp repo for latest fedora (>24)?
21:13
<vagrantc>
fedora hasn't had anyone working on it for quite some time, unfortunately
21:14
<BillLong>
Thanks.
21:20
<vagrantc>
main actively supported distros at this point are Debian and Ubuntu
21:20
and even that could use some work...
21:21* vagrantc sighs
21:24
<alkisg>
:)
21:24
BillLong: bcg has been working on fedora versions, maybe he has some packages to share...
21:37
<vagrantc>
oh, didn't know about bcg
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22:23
<BillLong>
alkisg: I will check it out
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