IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 4 May 2021 (all times are UTC)
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| 07:23 | <mistik1> greetings folks
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| 07:23 | <alkisg> Hello mistik1
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| 07:24 | <mistik1> Its been some time glad to see you guys still at the job :)
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| 07:24 | <alkisg> There are few left, but we're still going!
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| 07:28 | <mistik1> Well I have a computer again, so i'll be around a bit more
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| 07:29 | <alkisg> Woah you managed to live without one?! :D
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| 07:29 | <mistik1> *sigh* 1 year now
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| 07:29 | * alkisg wants to find enough time in the summer to test that... | |
| 07:30 | <mistik1> I am totally off grid and when I finished my house and setup solar the laptop did not turn on
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| 07:30 | <alkisg> Ouch. And for wifi, using 4g/5g?
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| 07:30 | *for internet access
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| 07:30 | <mistik1> 4g
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| 07:30 | <alkisg> Good enough
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| 07:31 | <mistik1> good enough that i'm listening to a book and using the net, setting up this machine
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| 07:32 | I'm so rusty, need to get coding on something again soon
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| 07:32 | <alkisg> If you have a second computer or a VM, you can test the new ltsp! :)
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| 07:33 | <mistik1> I do have a couple old RasPi around
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| 07:33 | <alkisg> raspi is harder, but I do have working documentation about it there: https://ltsp.org/docs/installation/raspios/
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| 07:34 | <mistik1> I was just reading that
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| 07:35 | I was seeing what direction the project has taken since I was involved
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| 07:35 | <alkisg> Where were you last contributions, which year?
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| 07:36 | <mistik1> circa 2014~2015
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| 07:36 | <alkisg> Ah OK you know about fat clients then
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| 07:36 | <mistik1> a long time as I said
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| 07:36 | Yes
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| 07:36 | <alkisg> Nowadays it's "fat clients only"; with remote desktop/rdp/vnc for thin client emulation
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| 07:37 | <mistik1> I just read the docs and am impressed, it certainly gets rid of the problems we had with remote sound and all that nonsense
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| 07:40 | <mistik1> anyhow, I still dont have enough batteries to do all nighters with the computer and lights, so i'll sign off for now
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| 07:40 | <alkisg> Good to see you again! Cheers
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| 07:40 | <mistik1> Take care
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| 10:20 | <ltsp_user17> hello everyone
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| 10:20 | <alkisg> Hello ltsp_user17
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| 10:20 | <ltsp_user17> I've ltsp to netboot my ubuntu 18.04 server
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| 10:20 | but i don't know why my openssh-server at client no enable
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| 10:21 | I've check on my server it's on with
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| 10:21 | systemctl is-enabled ssh
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| 10:21 | enabled
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| 10:21 | but on my client I've checkd it's disable
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| 10:22 | how can I enable openssh-server at all client
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| 10:22 | <alkisg> !sshd
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| 10:22 | <ltspbot> sshd: Exposing sshd host keys over NFS is unsafe, so it's disabled by default and !epoptes is recommended instead. If you insist on running sshd in LTSP clients, read https://github.com/ltsp/ltsp/discussions/310#discussioncomment-101549
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| 10:22 | <alkisg> !epoptes
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| 10:22 | <ltspbot> epoptes: Epoptes is a computer lab administration and monitoring tool. It works on Ubuntu and Debian based labs with LTSP or non-LTSP servers, thin and fat clients, standalone workstations, NX clients etc. More info: https://epoptes.org
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| 10:22 | <alkisg> ltsp_user17: read these ^
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| 10:23 | <ltsp_user17> thank you, I've read that post
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| 10:23 | my issue is openssh-server on client not auto start when booting
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| 10:23 | when I login into client and manualy start openssh-server, I can ssh into that client
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| 10:24 | But I want to auto enable openssh-server when booting all client
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| 10:24 | <alkisg> ltsp_user17: so you have KEEP_SYSTEM_SERVICES=ssh in ltsp.conf?
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| 10:25 | <ltsp_user17> yes, I have KEEP_SYSTEM_SERVICES=ssh
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| 10:25 | <alkisg> And all the rest, like POST_INIT_MV_SSH ?
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| 10:27 | <ltsp_user17> I added that
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| 10:27 | [server]
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| 10:27 | OMIT_FUNCTIONS="ssh_host_keys"
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| 10:27 | OMIT_IMAGE_EXCLUDES="etc/ssh/ssh_host_*"
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| 10:27 | [clients]
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| 10:27 | KEEP_SYSTEM_SERVICES="openssh-server"
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| 10:27 | I ssh with my password
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| 10:27 | <alkisg> ltsp_user17: don't do that
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| 10:27 | Read the link that I pasted instead
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| 10:27 | Use the POST_INIT_MV_SSH directive etc
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| 10:28 | <ltsp_user17> oh, let me try
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| 10:28 | thank you, another question
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| 10:28 | how can I execute custom script when boot client
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| 10:29 | <alkisg> At init? After boot? At login?
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| 10:29 | What does this do, does it need xorg access?
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| 10:29 | <ltsp_user17> after boot
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| 10:29 | <alkisg> Does it stay running?
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| 10:29 | Anyway one way is POST_SERVICE_X="command"
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| 10:29 | <ltsp_user17> no UI, it's just command
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| 10:29 | <alkisg> This runs it around the time that the login screen is reached
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| 10:29 | <ltsp_user17> I've running ubuntu server, not desktop
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| 10:29 | <alkisg> Isn't POST_INIT_X better?
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| 10:30 | If you say what it's doing, I'll tell you where it's better. Otherwise use one of them...
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| 10:30 | <ltsp_user17> what difference between POST_SERVICE_X and POST_INIT_X
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| 10:30 | <alkisg> init is very early, like init=/bin/bash
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| 10:31 | service is later, like rc.local
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| 10:31 | <ltsp_user17> where I can find any example or document about it
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| 10:31 | <alkisg> For most tasks, init is better
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| 10:31 | In the ltsp.conf man page
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| 10:31 | !ltsp.conf
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| 10:31 | <ltspbot> ltsp.conf: Configuration file for LTSP: https://ltsp.org/man/ltsp.conf/
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| 10:33 | <ltsp_user17> I've tried post_init to set root account
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| 10:33 | POST_INIT_SET_ROOT_HASH="section_set_root_hash"
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| 10:33 | # This is the hash of "qwer1234"; cat /etc/shadow to see your hash.
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| 10:33 | [set_root_hash]
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| 10:33 | sed 's|^root:[^:]*:|root:$6$bKP3Tahd$a06Zq1j.0eKswsZwmM7Ga76tKNCnueSC.6UhpZ4AFbduHqWA8nA5V/8pLHYFC4SrWdyaDGCgHeApMRNb7mwTq0:|' -i /etc/shadow
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| 10:33 | <alkisg> And?
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| 10:33 | <ltsp_user17> but i can't login with root account
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| 10:34 | <alkisg> Did you use your own hash, or this one?
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| 10:34 | <ltsp_user17> use this one
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| 10:34 | <alkisg> Also did you run `ltsp initrd`?
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| 10:34 | <ltsp_user17> root | qwer1234
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| 10:34 | yes I've ran ltsp initrd
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| 10:34 | and when login into my client
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| 10:35 | I can saw root with hash at /etc/shadow
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| 10:35 | but I can't login
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| 10:35 | don't know why
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| 10:35 | <alkisg> Maybe the hash is wrong, use another one
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| 10:35 | <ltsp_user17> root@ltsp143:~# cat /etc/shadow | grep root
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| 10:35 | root:$6$bKP3Tahd$a06Zq1j.0eKswsZwmM7Ga76tKNCnueSC.6UhpZ4AFbduHqWA8nA5V/8pLHYFC4SrWdyaDGCgHeApMRNb7mwTq0:::::::
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| 10:35 | you can see
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| 10:36 | <alkisg> Type passwd, set qwer1234 as the password, then cat shadow and use that hash
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| 10:36 | Maybe the ltsp.conf man page example hash is wrong
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| 10:36 | <ltsp_user17> ok, let me try
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| 10:50 | <ltsp_user17> I think it's wrong
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| 10:50 | but I change still not work :(
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| 10:51 | root@ubuntu18:~# cat /etc/shadow | grep demo
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| 10:51 | demo:$6$FBPBqMA0$h5z8nRzHgsG07swgt7jzkvkwHQMs3f3YMOGKLbTK6kk/rkTs2oZ0GY3Qa7SQMKCgdd2uh7b4OOvd2E4GFWIwD/:18751:0:99999:7:::
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| 10:51 | root@ubuntu18:~# cat /etc/ltsp/ltsp.conf | grep sed
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| 10:51 | # The hash contains $, making it hard to escape in POST_INIT_x="sed ...".
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| 10:51 | # So put sed in a section and call it at POST_INIT like this:
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| 10:51 | #sed 's|^root:[^:]*:|root:$6$bKP3Tahd$a06Zq1j.0eKswsZwmM7Ga76tKNCnueSC.6UhpZ4AFbduHqWA8nA5V/8pLHYFC4SrWdyaDGCgHeApMRNb7mwTq1:|' -i /etc/shadow
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| 10:51 | sed 's|^root:[^:]*:|root:$6$MgFtSVYk$YWDt2Hl0rs9CVeu3d0Sl7Fn9VLDJSwFj4hf.pOxwqTvnxeqeJDpKJ5OVYjSIU8U7ZHkZG82Kqe2.Agu3Qlp/K.' -i /etc/shadow
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| 10:53 | when boot client, it throw: sed: -e expression #1, char 118: unterminated `s' command
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| 10:57 | <alkisg> Yes see the man page example, it needs a | at the end
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| 10:57 | I.e. it's like this: sed 's|what-to-search|replacement|' -i /etc/shadow
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| 11:02 | <ltsp_user17> oh, I bypass that error, but still incorrect pass
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| 11:03 | Can you provide me sed command for passwd: qwer1234
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| 11:07 | I saw everytime I change with same password, it's generate difference hash, don't know why :))
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| 11:22 | for ssh I added POST_INIT_MV_SSH and no luck, openssh not auto start
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| 12:13 | <ltsp_user17> Hi alkisg, I tried setup ssh key and auto enable service with POST_SERVICE_, it work!
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| 12:14 | thank you
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| 12:29 | <alkisg> ltsp_user17: great
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| 12:42 | <ltsp_user17> I wonder when ltsp server is down, can my client still work or crash?
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| 12:49 | <alkisg> ltsp_user17: access to nfs files makes the client hang until the server is up again
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| 12:50 | Access to sshfs files (under /home/username) is less tolerant, it doesn't survive reboots
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| 12:55 | <ltsp_user17> what's nfs file?, it include rootfs ?
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| 12:59 | <alkisg> Yes, all rootfs (all files under /) is accessed via NFS
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| 13:31 | <AppleMuncy> !news
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| 13:31 | <ltspbot> I do not know about 'news', but I do know about these similar topics: 'nfs'
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| 13:41 | <ltsp_user17> Hi alkisg, on my client, I just saw /home/user01 mounted with nfs
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| 13:41 | root@ltsp143:~# df -h
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| 13:41 | Filesystem Size Used Avail Use% Mounted on
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| 13:41 | udev 456M 0 456M 0% /dev
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| 13:41 | tmpfs 99M 2.0M 97M 3% /run
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| 13:41 | tmpfs 493M 5.7M 487M 2% /run/initramfs/ltsp
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| 13:41 | tmpfs 493M 0 493M 0% /dev/shm
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| 13:41 | tmpfs 5.0M 4.0K 5.0M 1% /run/lock
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| 13:41 | tmpfs 493M 0 493M 0% /sys/fs/cgroup
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| 13:41 | user01@server: 8.8G 7.5G 942M 89% /home/user01
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| 13:41 | tmpfs 99M 0 99M 0% /run/user/1000
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| 13:41 | tmpfs 99M 0 99M 0% /run/user/0
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| 13:41 | <alkisg> !paste
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| 13:41 | <ltspbot> paste: To avoid channel flooding, please upload text longer than 3 lines to http://paste.debian.net. Don't forget to paste the resulting URL here.
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| 13:41 | <ltsp_user17> you can see here
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| 13:41 | http://paste.debian.net/1196250/
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| 13:41 | <alkisg> That's sshfs, not nfs
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| 13:42 | / is mounted via nfs, while /home/username with sshfs
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| 13:42 | You can also mount /home with nfs if you want, but it's not the default
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| 13:42 | !nfs
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| 13:42 | <ltspbot> nfs: to enable NFS home directories for localapps and fat clients, install nfs-kernel-server on your server, nfs-common on your client (don't forget ltsp-update-image), and put this in lts.conf: FSTAB_1="server:/home /home nfs defaults,nolock 0 0"
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| 13:42 | <alkisg> !forget nfs
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| 13:42 | <ltspbot> The operation succeeded.
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| 13:42 | <alkisg> !nfs
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| 13:42 | <ltspbot> I do not know about 'nfs', but I do know about these similar topics: 'ltsp-nfs', 'nfsnotresp', 'squashfs-over-nfs'
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| 13:42 | <alkisg> !ltsp-nfs
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| 13:42 | <ltspbot> ltsp-nfs: Configure NFS exports for LTSP: https://ltsp.org/man/ltsp-nfs/
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| 13:44 | <alkisg> !learn nfs-home as You can mount /home over NFS, see https://ltsp.org/man/ltsp-nfs/#examples - it's faster and more stable than SSHFS, but also insecure
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| 13:44 | <ltspbot> The operation succeeded.
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| 13:44 | <ltsp_user17> so if all rootfs mount by nfs, it will hang when ltsp server stop :(
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| 13:45 | <alkisg> Yes, when you have your files in a server, you don't want the server to stop
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| 13:45 | There's no magic involved
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| 13:46 | <ltsp_user17> does IMAGE_TO_RAM will help this ?
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| 13:46 | <alkisg> Are your users able to save files?
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| 13:46 | E.g. documents, mails etc?
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| 13:46 | <ltsp_user17> my users just save some config text, it's so small
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| 13:47 | <alkisg> Where will that small be saved, in the air?
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| 13:47 | <ltsp_user17> and I don't want when ltsp server is down or network is stuck, all my client is hang
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| 13:47 | <alkisg> On the server, on a local disk, on the internet, on a usb stick?
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| 13:47 | Do you have kiosks or normal ltsp clients?
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| 13:47 | If you have kiosks, and NOT users, then you can have them work without the server, all in ram
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| 13:48 | If you have users, with dconf settings, small text files, or large videos, then you need to find storage for them
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| 13:48 | <ltsp_user17> oh, my usecase is kiosks, not users
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| 13:48 | <alkisg> It took a while to say that :)
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| 13:49 | !kiosk
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| 13:49 | <ltspbot> I do not know about 'kiosk', but I do know about these similar topics: 'kiwi', 'kms'
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| 13:49 | <ltsp_user17> I just want all my client running a app, and when I update on ltsp server, reboot all my client
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| 13:49 | <alkisg> How much RAM do your clients have?
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| 13:49 | <ltsp_user17> and it will affect all my client
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| 13:50 | it will be > 4GB
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| 13:50 | <alkisg> Then yes it sounds like you want IMAGE_TO_RAM
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| 13:50 | That way you'll be able to power off the server, and the clients will keep working
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| 13:52 | <ltsp_user17> yes that what I want to do
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| 13:52 | but I got issue
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| 13:53 | https://github.com/ltsp/ltsp/discussions/269
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| 13:53 | like this
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| 13:54 | <alkisg> There's no point in using IMAGE_TO_RAM with sshfs
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| 13:54 | You'll need to create a local user in RAM, not on the server
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| 13:54 | <alkisg> LTSP doesn't have code for that yet, you'll need to do it manually
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| 13:55 | <ltsp_user17> how can I create local user
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| 13:55 | <alkisg> With adduser. Sorry but I don't have a couple of hours to implement this for you over IRC :)
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| 13:58 | <ltsp_user17> yes, thank for your time, you've very kind
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| 13:58 | <alkisg> You're welcome
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| 13:58 | <ltsp_user17> so If I got problem, I will raise on github
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| 13:58 | <alkisg> You'll need to implement that part for yourself...
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| 13:59 | It's a whole new feature that I have no interest to do at this moment in time
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| 13:59 | If sponsoring is found, then I can do new features for others, but I only do new features for free for the schools I maintain
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| 14:00 | <ltsp_user17> If I undertand ltsp deep enough, I will implement it for sure
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| 14:00 | <alkisg> Sure, it will just need some time. Patches welcome.
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| 14:01 | <ltsp_user17> is there any document for understand and develop ltsp?
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| 14:01 | <alkisg> The documentation at ltsp.org, and the code
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| 14:01 | That's all there is
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| 14:03 | <ltsp_user17> yes, thank you, I will try for myself, If I got a issue, hope you guide me to implement it : D
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| 14:04 | <alkisg> It depends on how much YOU help others!
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| 14:04 | I can't help everyone, but I can help those that help other ltsp users
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| 14:04 | <ltsp_user17> yes, sure for that!
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| 14:09 | <alkisg> It also helps if you're not anonymous; noone like to talk with "ltsp_user17", while even if it's "john1234", it's more friendly :)
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| 14:09 | ltsp_user17 is now known as cbr09 | |
| 14:09 | <cbr09> yes I changed my name :D
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| 14:10 | <alkisg> Better, at least now it's something to remember for future chats
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| 14:10 | cbr09 is now known as jaycb09 | |
| 14:10 | <jaycb09> yes: D
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| 14:11 | at your school, how many client do you have
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| 14:13 | <alkisg> I help maintain more than 1000 schools
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| 14:13 | Schools usually have 1 to 3 computer labs with 12 clients and a server. But I've set up LTSP in other areas with more than 100 clients.
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| 14:13 | If you're going to use IMAGE_TO_RAM, then you can serve any number of clients
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| 14:14 | <jaycb09> yes, I see, with nfs mount, large client will have lag
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| 14:15 | <alkisg> The main problem is /home/username
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| 14:15 | Because when a user opens firefox or libreoffice, it writes there
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| 14:15 | So if you have 100 users, you need a lot of bandwidth
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| 14:15 | But if you have kiosks, you don't care about that, your /home is in RAM
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| 14:16 | So the main traffic is SSHFS, not NFS
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| 14:17 | <jaycb09> why ltsp choose /home with sshfs, it can be mount over nfs
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| 14:17 | what's advance for using sshfs than nfs
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| 14:19 | <alkisg> !nfs-home
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| 14:19 | <ltspbot> nfs-home: You can mount /home over NFS, see https://ltsp.org/man/ltsp-nfs/#examples - it's faster and more stable than SSHFS, but also insecure
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| 14:19 | <alkisg> The "insecure" part
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| 14:19 | We don't want "insecure" by default
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| 14:24 | <jaycb09> yes, security is first
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