IRC chat logs for #ltsp on irc.libera.chat (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?
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| 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'.
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| 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
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| 15:59 | <vagrantc> ltsp hasn't been well tested with ipv6...
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| 16:04 | <fzimper> I never intended to use it. But my "localhost" was resolved to "::1"
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| 16:05 | <vagrantc> what distro?
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| 16:05 | <fzimper> Ubuntu 16.04
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| 16:05 | <vagrantc> are you using the ltsp ppa, or packages from 16.04?
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| 16:05 | !ppa
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| 16:05 | <ltsp> I do not know about 'ppa', but I do know about these similar topics: 'sbalneav-ppa', 'greek-schools-ppa'
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| 16:06 | <vagrantc> !greek-schools-ppa | echo fzimper
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| 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
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| 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
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| 16:32 | !jetpipe
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| 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 &"
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| 16:32 | <alkisg> !printer
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| 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
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| 16:32 | <alkisg> !printers
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| 16:32 | <ltsp> I do not know about 'printers', but I do know about these similar topics: 'fatclient-printers'
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| 16:32 | <alkisg> !fatclient-printers
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| 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
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| 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
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| 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?
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| 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
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| 17:00 | !local
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| 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'
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| 17:00 | <alkisg> !local-disks
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| 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"
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| 17:00 | <alkisg> JuJUBee: ^
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| 17:01 | <JuJUBee> alkisg, thanks. I am using fat clients
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| 17:02 | DO I still need LOCALDEV=true and LOCALDEV_DENY_INTERNAL_DISKS = false ?
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| 17:02 | <fzimper> alkisg: Yep, CUPS is not used on the fat client. But on the server and on the pi.
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| 17:03 | <alkisg> JuJUBee: no, only the RCFILE_01 that I pasted is needed
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| 17:03 | fzimper: the pi is a fat client and cups isn't used there as I described
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| 17:03 | <JuJUBee> Will that dir persist?
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| 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.
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| 17:04 | <JuJUBee> thanks, that is what I meant. Great
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| 17:04 | <alkisg> np
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| 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
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| 17:04 | The pi just acts as a print server in that case.
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| 17:04 | <alkisg> fzimper: in ltsp terminology, "fat client" is a diskless client netbooted from the ltsp server
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| 17:04 | <fzimper> Yep.
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| 17:04 | <alkisg> That's what pi is
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| 17:05 | So, pi is a fat client
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| 17:05 | Then, pi is supposed to be running jetpipe to forward the usb printer to the server
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| 17:05 | No cups involved at all
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| 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
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| 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
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| 17:05 | *not an ltsp client
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| 17:06 | <fzimper> Ok, never head of jetpipe. Will have a look at that
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| 17:06 | <alkisg> It's the standard printing method for ltsp, since 10 years or so...
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| 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
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| 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.
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| 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
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| 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)?
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| 21:13 | <vagrantc> fedora hasn't had anyone working on it for quite some time, unfortunately
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| 21:14 | <BillLong> Thanks.
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| 21:20 | <vagrantc> main actively supported distros at this point are Debian and Ubuntu
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| 21:20 | and even that could use some work...
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| 21:21 | * vagrantc sighs | |
| 21:24 | <alkisg> :)
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| 21:24 | BillLong: bcg has been working on fedora versions, maybe he has some packages to share...
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| 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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