IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 4 October 2012 (all times are UTC)
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| 02:04 | <h20> i need help with my ubuntu 12.04 ltsp setup
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| 02:04 | my clients can not connect to the nbd-server
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| 02:05 | i get bad port range, error connect: connection refused
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| 02:05 | my tftp server is different from my ltsp server
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| 02:06 | so my nbdroot is set as nbdroot=192.168.1.100:ltsp_i386
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| 02:08 | btw, what does ltsp-update-image do? i did an lstp-update-image -a i386 -p 2000 because I recall doing that when configuring ltsp on 10.4
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| 02:09 | what changes when the port is included?
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| 03:20 | <muppis> h20, leave the -p 2000 out from ltsp-update-image, no longer needed in 12.04
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| 03:21 | <h20> muppis, thanks. i have rebuilt it without the -p option
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| 03:21 | i still get the same error
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| 03:21 | tcpdump on the server does not show that the client connects to the server for an nbd connection
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| 03:22 | setting it to nbdroot=IPofMyLTSPServer:ltsp_i386 is correct right?
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| 03:22 | since i do not have the same tftp server and ltsp server
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| 03:22 | <muppis> Hold on, I check.
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| 03:25 | Yes, if your tftpd and nbd are on different machines. I got only nbdroot=:ltsp_amd64 as I use 64bit clients.
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| 03:25 | And server is same.
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| 03:26 | <h20> muppis, thanks i just used ltsp-update-image -S IPofMyNBDServer and it changed pxelinux.cfg/default to the format above
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| 03:27 | <muppis> And still not working?
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| 03:27 | <h20> muppis, i have set it that way already
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| 03:28 | and it is not working
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| 03:28 | do you know if ltsp-client-core is needed in the server?
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| 03:28 | i installed ltsp-server only
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| 03:28 | i am not using the standalone setup
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| 03:29 | <muppis> Not needed.
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| 03:29 | <h20> hmm
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| 03:29 | do you know what tools i can use on the terminal so i can do some debugging?
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| 03:29 | scripts i can run?
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| 03:30 | from the client which drops to ash
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| 03:35 | <muppis> Not really much from there. You can cat /proc/cmdline and compare it to the tftpd's one. Then can try to check from server which ports nbd-server listens on server and try manually connect to that with nbd-client
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| 03:36 | You can try nbd-client from that shell or from server chroot /opt/ltsp/i386/sbin/nbd-client
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| 03:38 | nbd-server should listen 10809
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| 03:39 | <h20> muppis, thanks will try it. the nbd-server is already running in the correct port
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| 03:40 | <muppis> And IP 0.0.0.0 ?
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| 03:40 | <h20> yes
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| 03:41 | muppis, i have the output of /proc/cmdline
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| 03:41 | what does the ip parameter mean?
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| 03:42 | <muppis> All zeros mean it listen all interfaces.
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| 03:42 | <h20> i get ip=192.168.1.57:192.168.1.2:192.168.1.2:255.255.255.0
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| 03:42 | <muppis> That's client ip, gw, dns and netmask
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| 03:43 | <h20> ah ok
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| 03:43 | so its fine
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| 03:43 | <muppis> If I remember order correctly.
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| 03:44 | <h20> muppis okey, because if it refers to the ltsp server then its wrong
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| 03:44 | <muppis> But now I need head to work. I'm from there in a hour.
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| 03:44 | <h20> muppis thanks
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| 04:04 | <alkisg> !nbd-client
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| 04:04 | <ltsp> nbd-client: To try mounting the NBD image from the client initramfs: nbd-client 192.168.67.1 -N /opt/ltsp/i386 /dev/nbd0
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| 04:05 | <alkisg> h20: try nbd-client server-ip -N :ltsp_i386 /dev/nbd0, from either the busybox shell or from another client
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| 04:05 | To verify that your server is set up correctly
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| 04:06 | <h20> alksig, thanks i was having trouble getting the correct parameters
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| 04:08 | alksig, i get the error cannot open NBD: no such file or directory
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| 04:08 | modprbe nbd does not solve it
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| 04:09 | i will try from another terminal
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| 04:09 | the error came from the thinclient which failed to connect
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| 04:11 | <alkisg> h20: use <tab> to autocomplete the user names in irc
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| 04:11 | h20: cannot open nbd? or nbd-client?
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| 04:12 | <h20> alkisg: its the out put from nbd-client
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| 04:13 | <alkisg> h20: ls -l /dev/nbd0
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| 04:13 | Is that file there?
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| 04:13 | <h20> yes /dev/nbd0 is there
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| 04:14 | <alkisg> ls /sbin/nbd-client
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| 04:14 | That there too?
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| 04:15 | <h20> alkisg: opps, its gone now. /dev/nbd0 was there a while ago
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| 04:15 | let me reboot the client
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| 04:15 | sorry i am slow to respond, i am doing this remotely from the place where the server and clients are
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| 04:15 | for the client i am just using virtualbox
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| 04:16 | <alkisg> In bridged mode, right?
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| 04:17 | <h20> alkisg: yes in bridge mode
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| 04:18 | alkisg: i rebooted and checked first for /dev/nbd0
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| 04:18 | its there now
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| 04:18 | i ran the nbd-client command
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| 04:19 | i still get error: cannot open nbd: no such file or directory
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| 04:19 | please ensure that the nbd module is loaded
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| 04:19 | <alkisg> Is that ubuntu 12.04?
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| 04:20 | <h20> alkisg: yes its 12.04 installed using server setup
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| 04:20 | i only installed ltsp-server
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| 04:21 | <alkisg> You'll also need X afterwards
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| 04:21 | And you run ltsp-build-client etc, I assume...
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| 04:21 | <h20> X is already installed in the server and i ran ltsp-build-client
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| 04:24 | <alkisg> Is /dev/nbd0 still there?
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| 04:25 | <h20> alkisg: it is still there, i think it got lost after i ran init again
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| 04:26 | that is why i opted to reboot it
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| 04:26 | <alkisg> Any errors in dmesg or /var/log/syslog?
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| 04:26 | <h20> i just tested using nbd-client from a desktop terminal
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| 04:26 | same error
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| 04:26 | alkisg: on the server?
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| 04:26 | <alkisg> Did you install nbd-client on the desktop terminal?
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| 04:27 | <h20> alkisg: yes
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| 04:27 | <alkisg> And modprobe'd nbd?
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| 04:27 | What command line are you using? Is the desktop 12.04 too?
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| 04:27 | <h20> alkisg: no since /dev/nbd0 is already there
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| 04:27 | alkisg: no, its a 10.04 desktop
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| 04:28 | <alkisg> 10.04 doesn't support -N
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| 04:28 | (no named nbd exports support)
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| 04:28 | <h20> alkisg: ah alright
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| 04:29 | <alkisg> On the busybox, nbd-client --help, does it say 2.9.25?
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| 04:30 | <h20> alkisg: no its 2.9.14
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| 04:30 | alkisg: i should upgrade the client?
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| 04:31 | <alkisg> h20: and the output of uname -a?
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| 04:31 | <alkisg> No, it seems that you're not sending the 12.04 initramfs to the client, but something else, might be a 10.04 initramfs
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| 04:32 | <h20> alkisg: 2.6.32-41-generic
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| 04:32 | <alkisg> $ uname -a
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| 04:32 | Linux alkis 3.2.0-31-generic-pae #50-Ubuntu SMP Fri Sep 7 16:39:45 UTC 2012 i686 i686 i386 GNU/Linux
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| 04:32 | Right, that's 10.04
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| 04:32 | Check your dhcp/tftp settings
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| 04:33 | <h20> alkisg: hmm, yes i think i have my boot images wrong
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| 04:33 | * alkisg has to go, bb in 1h | |
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| 04:40 | <h20> its working now. i got old 10.04 images mixed with the 12.04 images
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| 04:41 | <muppis> Sure not having a firewall set up at server?
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| 04:41 | Oh.. Got in backlog. :D
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| 04:42 | <h20> muppis, i think i was in the wrong server when i copied the images
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| 04:42 | <muppis> Oh.
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| 04:43 | <h20> i recall, i was being concerned of mixing things up
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| 04:43 | and i did
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| 04:43 | ;)
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| 04:43 | <muppis> Happens. Do you buidl an image on another server?
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| 04:43 | Build.
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| 04:43 | <h20> alkisg, figured it out
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| 04:44 | muppis, i built the images from the new server
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| 04:44 | <h20> but to get to the new server i have to pass by the old server
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| 04:44 | so the confusion
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| 04:44 | <muppis> Ah.
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| 07:53 | <thebwt> with thick clienting we have a manually installed service that tries to fetch the machine's ip address when started. for some reason it only ever gets 27.0.0.2 as the ip. any thoughts on where to go after this from?
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| 08:06 | <alkisg> What "service" do you mean? Isn't that plain dhcp?
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| 09:06 | <ltspuser_05> I have a scenario with a debian which is the DNS,DHCP and LTSP server....
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| 09:06 | This machine is responsable for the deployment of an ubuntu filesystem to some terminals...
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| 09:07 | the filesystem is based on ubuntu 12.04
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| 09:07 | but when it boots don't run the lts.conf and don't boot a LDM session...
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| 09:09 | and I saw in some articles that is necessary to have init=/sbin/init-ltsp in pxelinux.0/default but if I put this param the terminal doesn't boot
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| 09:09 | I don't know what I am doing wrong...
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| 09:35 | <Hyperbyte> ltspuser_05, are you using fat or thin clients?
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| 09:37 | Shouldn't matter much either way... generally speaking, if you want to run a different OS on the LTSP server, than the one you want to use for the clients, is to build an LTSP server with the intended OS, get it working 100%, then copy over the /opt/ltsp/ and /var/lib/tftpboot/ directories
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| 09:38 | You'll need to manually update the LTSP sshkeys, but that should be about it.
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| 09:38 | But - there's an even easier way, and this is the way I would go: virtualize your LTSP server.
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| 09:39 | At the radio station where I volunteer, I have a Fedora server which needs to serve Ubuntu LTSP. On the Fedora server, I run a virtual machine with Ubuntu 12.04 and LTSP.
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| 09:40 | No hacking required whatsoever, just runs fine out of the box... you just need to configure DHCP and you're ready to go.
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| 09:40 | Running a terminal server virtualized also has great advantages should you ever need to do maintenance, or a distro upgrade, since you can easily backup and restore virtual machines.
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| 09:43 | <ltspuser_05> yes I understand...
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| 09:44 | but the tftpboot and the filesystem must be in /var/lib/tftpboot/ and /opt/ltsp/?
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| 09:44 | or can I choose the place and send it using dhcp??
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| 09:45 | when I use the line init=/sbin/init-ltsp it gives me this error: "plymouthd: ply_terminal.c:630: ply_terminal_set_mode: Asssertion..."
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| 09:46 | I have changed the pxelinux.0/default and ut !quiet-splash but the error appears...
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| 09:51 | <Hyperbyte> ltspuser_05, the /opt/ltsp/ location is determined in the NBD config file. You will need to run NBD, and point it to that directory. The DHCP server determines the filename within that directory.
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| 09:52 | <ltspuser_05> but I need to use nfs...
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| 09:52 | <Hyperbyte> Hrm, Ubuntu uses NBD by default.
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| 09:53 | But - let's get to a simpler problem. Why have you chosen for this complicated setup?
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| 09:53 | <ltspuser_05> because I had this deployment for other terminals...
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| 09:53 | <Hyperbyte> Why are you not either running LTSP directly on Debian (yes, Debian has LTSP integrated too), or running Ubuntu inside a virtual PC?
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| 09:53 | <ltspuser_05> and I can't change...
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| 09:54 | I am running ltsp on debian...
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| 09:54 | but I need to send to the terminals an ubuntu filesystem...
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| 09:54 | <Hyperbyte> Why?
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| 09:55 | <ltspuser_05> because with a filesystem based on squeeze I couldn't open sessions using xdmcp
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| 09:55 | and the alternative was change to an ubuntu filesystem...
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| 09:56 | <Hyperbyte> Why do you need XDMCP?
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| 09:57 | <ltspuser_05> but if I delete this option init=/sbin/init-ltsp from pxelinux.o/default the terminal boots and I see a shell... but not running lts.conf to open a LDM session...
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| 09:57 | I only need LDM but with squeeze I was having problems with the themes
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| 09:57 | http://imagebin.org/230484
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| 09:58 | the firefox has a different theme...
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| 09:59 | and with this filesystem is all working...
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| 09:59 | <Hyperbyte> So instead of fixing the Firefox theme, you switched to a Ubuntu chroot, but with a Debian server?
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| 09:59 | <ltspuser_05> I tried to fix...
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| 09:59 | I asked here...
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| 09:59 | but I got no solution
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| 10:00 | but what's the problem? It's only the filesystem that is passed to the terminal...
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| 10:00 | right?
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| 10:01 | the Debian server is only for DHCP and DNS server...
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| 10:01 | <Hyperbyte> Why don't you just install Ubuntu then?
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| 10:02 | <ltspuser_05> because the installation is like this
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| 10:02 | I can't change right now
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| 10:02 | <Hyperbyte> Either way, the theme thing is caused by localapps running in a different theme I bet. I thought it was just a matter of installing the right theme in the client image.
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| 10:02 | But I haven't felt the need to fix it yet.
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| 10:03 | Alternatively you could disable Firefox as a localapp, if your system can handle that.
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| 10:03 | <ltspuser_05> It's not localapps... the apps was running on the server
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| 10:03 | I don't know what was happening with that scenario...
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| 10:04 | but with the ubuntu it's working...
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| 10:04 | <Hyperbyte> Right, but you've created a very difficult setup now, and I can't help you with it. Maybe someone else, but I've never ran a different chroot with LTSP than one 100% compatible with the host system.
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| 10:05 | Better wait a bit here, maybe if alkisg pays some attention he could help you.
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| 10:06 | <ltspuser_05> ok
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| 10:06 | I understand
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| 10:06 | thank you
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| 10:52 | <ltspuser_05> Hyperbyte could you tell alkisg the situation?
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| 11:34 | <Hyperbyte> ltspuser_05, you just did. :)
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| 11:35 | Alkis is one of the LTSP developers. He hangs out here. He's at work though. :)
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| 13:35 | <ltspuser_07> i want to custommize the client(running on raspberrypi) where are the config files for that?
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| 13:36 | anyone online?
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| 13:37 | <Hyperbyte> Hi...
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| 13:38 | <ltspuser_07> ah
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| 13:38 | <Hyperbyte> Be a little patient please, most of us are at work, or otherwise occupied. ;-)
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| 13:38 | <ltspuser_07> can you help me with my question?
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| 13:38 | <Hyperbyte> Waiting for a few hours (yes, HOURS ;-)) before you get an answer isn't very uncommon here. ;-)
| |
| 13:38 | As for your question... you'll need to be specific.
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| 13:38 | <ltspuser_07> ow thats sad
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| 13:38 | <Hyperbyte> What -exactly- do you want to compromise?
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| 13:39 | No, that's not sad :-) That's great! It means everyone involved in LTSP has a good job. :P
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| 13:39 | *compromise? -> customize
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| 13:39 | <ltspuser_07> thats true
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| 13:39 | yes customize
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| 13:39 | <Hyperbyte> Yes, what exactly? :P
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| 13:39 | <ltspuser_07> default session enz.
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| 13:40 | <Hyperbyte> 'enz'? You sound Dutch. :)
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| 13:40 | <ltspuser_07> ja precies
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| 13:40 | <Hyperbyte> Grappig. :) Anyway, session is set from lts.conf
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| 13:40 | !lts.conf
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| 13:40 | <ltsp> lts.conf: http://manpages.ubuntu.com/lts.conf
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| 13:40 | <knipwim> nederlanders!!!
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| 13:40 | <Hyperbyte> Particularly LDM_SESSION
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| 13:41 | Haha
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| 13:41 | <ltspuser_07> it's running on raspberrypi but i can buid new image
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| 13:42 | it's a minimal system
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| 13:42 | so no ubuntu or what ever
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| 13:42 | ubuntu is my server
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| 13:42 | <Hyperbyte> LTSP clients have no software on them. They boot from the network. Naturally, anything you want to configure on the clients, needs to be configured on the server.
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| 13:43 | <ltspuser_07> no my client has a minimum linux system running
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| 13:43 | raspberrypi can't boot from network
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| 13:44 | or am i seeing things wrong?
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| 13:44 | <Hyperbyte> They can't? Well that sucks greatly.
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| 13:44 | <ltspuser_07> but i get it runnging
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| 13:44 | running
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| 13:44 | <Hyperbyte> No, probably not. I haven't looked into Raspberry Pi... always found them promising, but if they don't netboot my interest is suddenly gone. :)
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| 13:45 | <ltspuser_07> i have one running right now(am typing this to you on my pi)
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| 13:45 | <Hyperbyte> Nice. :)
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| 13:45 | <ltspuser_07> see berryterminal.org
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| 13:45 | <Hyperbyte> No thanks... I'm at work remember? ;-)
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| 13:45 | <ltspuser_07> but i cant find the right config files
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| 13:46 | oh yeah sorry
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| 13:47 | <Hyperbyte> Anyway, if you don't use NBD network boot, but a local image with LDM, you lts.conf file should be in /etc/lts.conf I believe... of /etc/ltsp/lts.conf, not sure... knipwim knows lots more about this than I do.
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| 13:48 | <ltspuser_07> ok thank i'l check it out
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| 14:09 | <ltspuser_07> i cant find it
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| 14:11 | i only need the select your session side manager config file
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| 14:11 | <asmok> is there something (maybe) undocumented/caveats when using Epoptes with ltsp-pnp/fat clients? There is no own chroot for fat clients (ltsp-update-image --cleanup /)
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| 14:16 | <ltspuser_15> how can I put the ubuntu 12.04 working using nfs instead of nbd??
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| 14:32 | <servercbe> hello. I am having issues with my dhcp... It is not giving an IP to the thin clients!...
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| 14:32 | what can I do? Any Suggestions... :)
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| 14:34 | By the way... Good Morning!
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| 14:35 | mmm--- anybody there?
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| 14:36 | hello, hello, hello?
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| 14:36 | <dead_inside> chill servercbe
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| 14:38 | <servercbe> ok... I'm strees 'cause I have class in 1 hour... :(
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| 14:38 | <dead_inside> do you have anything in your dhcpd logs
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| 14:38 | on ubuntu /var/log/dhcpd/dhcpd.log
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| 14:39 | <servercbe> bash: /var/log/dhcpd/dhcpd.log: No existe el archivo o el directorio
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| 14:39 | doesnt exit
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| 14:39 | <dead_inside> is this ubuntu
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| 14:39 | <servercbe> edubuntu 12.04.1
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| 14:43 | <servercbe> any suggestion?
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| 14:45 | <dead_inside> i am trying to look for you
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| 14:45 | i rarely trouble shoot dhcp cause it usually always just works
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| 14:45 | !paste
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| 14:45 | <ltsp> paste: try !pastebot
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| 14:46 | <dead_inside> can you use like pastebin and upload your dhcp config so i can give it a quick look over?
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| 14:52 | <Hyperbyte> servercbe, is the dhcp server running?
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| 14:53 | <servercbe> to be honest.. I dont know..
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| 14:54 | I am a baby with this topics
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| 14:56 | <servercbe> can you send me a command to see everythin you need..
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| 15:14 | <servercbe> I got this message.. The controller of Hard diskn /dev/mapper/cryptswap1 is not ready...
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| 15:14 | what is that mean?
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| 15:15 | <dead_inside> did you get that message on the client or on the server
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| 15:15 | <servercbe> server
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| 15:16 | <dead_inside> i have never herd of that
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| 15:17 | but to see if dhcp is running try
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| 15:17 | ps aux | grep dhcp
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| 15:17 | <dead_inside> hopefully it shows you /usr/sbin/dhcpd3 -q -pf /var/run/dhcp3-server/dhcpd.pid -cf /etc/dhcp3/dhcpd.conf
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| 15:17 | or something like that
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| 15:21 | <servercbe> http://pastebin.com/j3q8qiwF
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| 15:25 | <dead_inside> you have two nics on your server?
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| 15:26 | cause your second interface is listening on dhcp… just seems where having a dhcp server that is pulling a dhcp ip address
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| 15:27 | alkisg has left IRC (alkisg!~alkisg@ubuntu/member/alkisg, Quit: Leaving.) | |
| 15:27 | <servercbe> nics? do you mean ethernet card??? yes
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| 15:28 | two...
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| 15:28 | One for internet and the other one for ltsp
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| 15:30 | I have 1 swich (8ports) where I get Internet and then I have another swich (24 port) where I conect 23 computers..
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| 15:31 | with ltsṕ
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| 15:32 | <dead_inside> is the internet side using DHCP to get it's ip address
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| 15:32 | ?
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| 15:50 | <servercbe> yes
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| 15:50 | sorry.. I was out for a moment
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| 15:50 | <dead_inside> thats ok
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| 15:50 | is the ip of your inside ethernet 10.0.3.1
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| 15:58 | <servercbe> no'that I know
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| 16:01 | Ltsp , I think should be 192.168......
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| 16:02 | mmm.. I' ll be back after class.. (without computers... :(
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| 16:04 | <dead_inside> a class without computers?
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| 16:04 | sounds painfull
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| 18:07 | <kb8wmc> alkisg: I finally got my Thinkpad T40 to properly boot to the server, what made the difference for me was the creation of an "T40-xorg.conf" file for the client to use, then all fell in place...
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| 18:25 | <asmok> sorry for noise, about Epoptes and ltsp-pnp/fat client: http://arkki.info/howto/Precise/epoptes-ltsp-pnp.png
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| 18:50 | <markit> hi ppl, hi alkisg ... do you have some time (now or later) to try to help me troubleshooting why I can't connect in ssh to fat client?
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| 18:52 | <alkisg> Hi markit, sure but I'll be a little slow to respond, I'm doing something...
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| 18:53 | <markit> don't worry for me, alone I'm not able to solve so... just tell me when you want to stop
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| 18:53 | * markit turns proxmox server on, with a ltsp VM | |
| 18:54 | <alkisg> markit: you're supposed to (1) install openssh-server to the chroot, (2) configure sshd_config to allow root logins, (3) set up a root password in the chroot, (4) ltsp-update-image
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| 18:54 | ...or you can just use epoptes instead of all that :D
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| 18:54 | Are you sure you want ssh and that epoptes isn't enough for your needs?
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| 18:55 | <markit> well, I don't have access to the VM display, so ssh would be much better
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| 18:55 | since it SHOULD "just works"
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| 18:55 | <alkisg> You do know that epoptes can give you a root console without even X running, right?
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| 18:55 | <markit> ehm... no :)
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| 18:55 | <alkisg> RIght click, open terminal, root, locally
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| 18:55 | <markit> oh, you mean X on the client
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| 18:55 | <alkisg> Yeah
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| 18:55 | <markit> but to run epoptes I need to see the server display
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| 18:56 | I could ssh -X to the server
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| 18:56 | run epoptes...?
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| 18:56 | <alkisg> Yup
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| 18:56 | And you can even tell the client to connect by console to your remote pc at home, whatever
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| 18:56 | <markit> ok, I would love to try ssh, but if we find is something that is not working, I will use epoptes
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| 18:56 | <alkisg> OK
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| 18:56 | Did you do the 4 steps above?
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| 18:57 | <markit> ehm, still booting, but as far as I remember, I did
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| 18:57 | just better check once more
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| 18:57 | * markit proxmox doing fsck... sigh | |
| 18:57 | <alkisg> You can also set a password locally and use a sudoer to do whatever you want
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| 18:57 | (ssh as the user)
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| 18:57 | <markit> define "locally"
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| 18:57 | <alkisg> You have many alternatives, no need for root, but np, whatever you like
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| 18:58 | On the fat client: passwd (as a sudoer user)
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| 18:58 | Then use ssh to ssh as that user with that password
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| 18:58 | And then run sudo <command>
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| 18:58 | <markit> ah, I see, but I want to ssh at LDM stage
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| 18:58 | to be able to profile in some way kde / plasma behaviour
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| 18:58 | <alkisg> OK - you can still create a user with epoptes or with screen_02=shell, but np
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| 18:59 | <alkisg> And finally, you could set the user password, install ssh etc from epoptes or from screen_02=shell, no need to run ltsp-update-image
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| 18:59 | *the root password
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| 18:59 | And changes would be lost after reboot, keeping your chroot clean
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| 19:00 | ...many options... :D
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| 19:00 | <markit> I did it initially, but did not worked
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| 19:00 | now I wonder if I activated shorewall by mistake
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| 19:01 | ltsp-chroot -a i386 -p -d -c
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| 19:01 | '# passwd
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| 19:02 | password updated correctly
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| 19:02 | <markit> ii openssh-server 1:5.9p1-5ubuntu1
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| 19:02 | '# grep -i root /etc/ssh/sshd_config
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| 19:03 | PermitRootLogin yes
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| 19:03 | exit
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| 19:03 | <alkisg> Is the client booted? Do you have some root access to it to try stuff? (epoptes, screen_02=shell...)
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| 19:03 | <markit> I've screen_02
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| 19:03 | I could boot the client asap
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| 19:03 | I'm pretty sure that root password was set previously
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| 19:04 | <alkisg> Wait, is it working now or not?
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| 19:05 | <markit> shorewall is NOT enabled
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| 19:05 | let me check, FAT is booting, now at ldm
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| 19:05 | # ssh root@192.168.20.102
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| 19:05 | Connection closed by 192.168.20.102
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| 19:05 | let me enter in teh fat with 02=shell
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| 19:06 | ps ax shows sshd -D running
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| 19:07 | if I run tcpdump in teh FAT client I have in the server
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| 19:07 | # ssh root@192.168.20.102
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| 19:07 | Read from socket failed: Connection reset by peer
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| 19:08 | and I see that tries to connect
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| 19:08 | seems like there is something wrong at ssh protocol level
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| 19:09 | googling I've found the suggstion to edit /etc/ssh/ssh_config
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| 19:09 | <alkisg> Try ssh localhost, from screen_02
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| 19:09 | <markit> (I did in the server)
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| 19:09 | ok
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| 19:09 | Read from socket failed: Connection reset by peer
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| 19:10 | I'm using sshfs and not NFS, just in case is relevant
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| 19:10 | (don't think so but...)
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| 19:11 | <alkisg> screen_02: netstat -nap|grep :22
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| 19:12 | And tail /var/log/auth.log
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| 19:12 | <markit> ehm, netstat not installed sigh
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| 19:13 | root@gs1204:~# nmap 192.168.20.102
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| 19:13 | 22/tcp open ssh
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| 19:13 | <markit> (if is relevant too.. nmap from the server )
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| 19:13 | ok
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| 19:14 | auth log
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| 19:14 | could not load host keys /etc/ssh/ss_host_ecdsa_key
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| 19:14 | <alkisg> netstat is part of net-tools, which is part of ubuntu-minimal
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| 19:14 | So it would be very strange if it isn't installed
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| 19:14 | <markit> fatal not supported key exchange
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| 19:15 | ii net-tools
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| 19:15 | <alkisg> ls /bin/netstat
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| 19:15 | <markit> maybe I wrote badly, let's check
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| 19:16 | ehm, shame non my I wrote nAtstat
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| 19:16 | it's listening on 0.0.0.0
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| 19:16 | but from auth log seems a key exchange problem
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| 19:16 | <alkisg> screen_02: ls -lha /etc/ssh/*key
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| 19:16 | -rw------- 1 root root 668 Δεκ 6 2011 /etc/ssh/ssh_host_dsa_key
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| 19:16 | -rw------- 1 root root 227 Δεκ 6 2011 /etc/ssh/ssh_host_ecdsa_key
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| 19:16 | -rw------- 1 root root 1,7K Δεκ 6 2011 /etc/ssh/ssh_host_rsa_key
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| 19:16 | You should see something like that
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| 19:17 | <markit> none of the above
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| 19:17 | <alkisg> Bad sshd installation
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| 19:17 | <markit> in the rid there are some *.pub files
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| 19:17 | <alkisg> screen_02: apt-get purge openssh-server; apt-get install openssh-server
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| 19:18 | <markit> so lucky :(
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| 19:18 | <alkisg> It probably warned you when you tried to install it
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| 19:19 | <markit> now I have the keys
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| 19:19 | <alkisg> Allow root from sshd_config, restart openssh_server, try to connect
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| 19:20 | <markit> alkisg: it works!!! thanks so much
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| 19:20 | <alkisg> Cool, so, reinstall openssh_server in the chroot, ltsp-update-image etc
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| 19:20 | <markit> you solved in a bunch of minutes/tests, I would NEVER be able to troubleshoot
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| 19:20 | I'm wondering if I better learn tennis instead of insist with IT
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| 19:21 | <alkisg> Hahaha
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| 19:21 | markit: btw some time I'd like to re-do the network benchmarks on your lab
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| 19:21 | <markit> but probably I would have problems there too
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| 19:21 | alkisg: would love to do
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| 19:21 | <alkisg> From the video you sent me once, it seems like 100mbps server network speed, not gigabit...
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| 19:22 | <markit> I can pastebin you the last test I did
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| 19:22 | so you can check if I did it badly
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| 19:22 | (hoping to find the file)
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| 19:22 | <alkisg> markit: did you manually turn flow control off on the server?
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| 19:23 | <knipwim> alkisg: i'm getting the following error when installing epoptes
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| 19:23 | http://dpaste.com/809927/
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| 19:23 | <alkisg> Phantomas: ^ /me brb
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| 19:23 | <markit> alkisg: no, never
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| 19:24 | <alkisg> markit: ok it's still possible that your switch is good enough, but we should re-test
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| 19:24 | <markit> it's an expensive one
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| 19:24 | I've the pdf manual, let me check
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| 19:25 | default settings: Flow control: Off
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| 19:25 | Duplex: Auto
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| 19:25 | Speed: Auto
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| 19:25 | end :)
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| 19:26 | in any case, I will check next time
| |
| 19:27 | alkisg: btw, I've not found a method to log the I/O traffic done by each process during KDE start.. iotop -o gives you the instant value
| |
| 19:28 | I would love to have something you can run and then have the "top 20" processes and how much they I/O to the disk
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| 19:28 | <Phantomas> knipwim: Which version of python-distutils-extra do you have installed?
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| 19:29 | markit: have you tried Iotop?
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| 19:29 | (I have not)
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| 19:33 | markit: ehm, sorry, rushed reading :)
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| 19:33 | <markit> ;P
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| 19:33 | it's the standard reply you usually get in FOSS forums
| |
| 19:33 | "I need X, I've tried Y but does not work" R.: "try Y"
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| 19:34 | <Phantomas> but I haven't understand what's your problem with iotop
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| 19:36 | markit: if you run sudo iotop you have a top-like interface
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| 19:36 | <markit> Phantomas: I want to see during "plasma" (kde desktop) load what process has heavy I/O
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| 19:37 | with iotop I can see it but rows jumps up and down
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| 19:37 | I should make a movie of the screen
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| 19:37 | I would love instead to have a sort of "log file"
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| 19:37 | with processes listed and I/O involved
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| 19:37 | so I can send to KDE devs
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| 19:37 | brb
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| 19:37 | <Phantomas> iotop -b maybe?
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| 19:38 | <markit> I've found some flag that can help
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| 19:38 | <Phantomas> iotop -b > my_io_usage_logs
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| 19:38 | <markit> but wondered if there was the right took
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| 19:38 | <markit> yes, but then you have a lot of "screenshot" of iotop
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| 19:38 | not the total
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| 19:39 | <markit> if a process does i/o, then nothing, then again
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| 19:39 | you may have it in 1st and 4° batch
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| 19:41 | <alkisg> markit: the goal of all that is to find out what's causing all this traffic in KDE?
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| 19:41 | <alkisg> Or just to show the devs that indeed there is traffic?
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| 19:48 | <knipwim> Phantomas: 2.33
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| 19:48 | <alkisg> knipwim: Phantomas is the one that writes the python parts of epoptes, I'm writing the shell parts ;)
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| 19:48 | Phantomas: knipwim is the Gentoo LTSP maintainer
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| 19:49 | knipwim: btw the setup.py isn't a proper python setup file, it's just a helper to put the files in the correct place when debhelper creates the .deb package
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| 19:50 | So I've never tried to install it from source, I don't know if it works that way...
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| 19:50 | (we didn't have enough time to read ALL the instructions about creating proper setup.py installers :D)
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| 19:51 | <knipwim> ah, that could explain a lot
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| 19:52 | <alkisg> Of course we're interested in fixing it, but it would take some time
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| 19:53 | <knipwim> no worries
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| 19:53 | perhaps Phantomas has the key to solving it
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| 19:54 | <knipwim> knowing the setup.py isn't complete
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| 19:54 | i could try to make it work
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| 19:54 | taking the current epoptes builds in ubuntu/debian as a reference
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| 20:01 | <alkisg> We're getting ready for a workshop in 2 days so we'll probably have to postpone any work in setup.py until Monday... but if you can get it to work, we'd gladly accept any patches :)
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| 20:07 | <markit> alkisg: what is causing traffic... even if just in local installation you have a high I/O
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| 20:08 | so I would love have had a reply like "oh, just disable XYZ"
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| 20:08 | instead they were wondering why lan traffic is 3 times "local workstation" I/O
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| 20:08 | and if the cache was really used or rebuild many times by different part
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| 20:08 | <markit> that could not work fine due to some ltsp limitation
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| 20:09 | (not having follow_symlink work could be a big problem)
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| 20:11 | maybe fixing the "Call to lnusertemp failed (temporary directory full?)" error with follow_symlink = true could give some benefit
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| 20:12 | but I don't understand the insight of ltsp nor of kde, so is beyond my capability
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| 20:36 | <alkisg> markit: remind me in a couple of weeks to have a look at KDE+LTSP...
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| 20:37 | <markit> alkisg: oh, great, thanks a LOT
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| 20:37 | btw, I spend some time digging into it too, I'm reading the lounch script and is well commented
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| 20:38 | I will not understand what kde is doing "inner", but at least I will see what is the run sequence
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| 20:39 | <alkisg> I can imagine that it creates a big cache at the first login, but I can't imagine KDE not using it on subsequent logins
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| 20:49 | <markit> alkisg: I chrooted, aptitude purge openssh-server / install, rebuild image, but I've again the same problem (ssh does not work, and *key missing!!!)
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| 20:50 | <alkisg> markit: (1) how do you chroot? (2) what's the output of apt-get install openssh-server in the chroot?
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| 20:50 | <markit> in chroot I've those files, but not in _02=shell
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| 20:50 | ltsp-chroot -a i386 -p -d -c
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| 20:51 | <alkisg> sudo mount -o loop,ro /opt/ltsp/images/i386.img /mnt; ls -lha /mnt/etc/ssh/*key; sudo umount /mnt
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| 20:52 | <markit> is it "normal"?
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| 20:52 | <alkisg> Are they there in i386.img? Run the above ^ commands to see...
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| 20:53 | <markit> no, there are not
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| 20:53 | in image I find what I find in the fat client (of course :)) and there are no +key files
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| 20:54 | <alkisg> markit: sudo kate /etc/ltsp/ltsp-update-image.excludes
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| 20:54 | ...and remove the line that mentions /etc/ssh/*
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| 20:54 | etc/ssh/ssh_host_*_key
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| 20:54 | ...and then run ltsp-update-image again
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| 20:54 | <markit> oh... etc/ssh/ssh_host_*_key
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| 20:54 | probably somethign to fix upstream?
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| 20:55 | <alkisg> No, it's unsafe to have ssh keys in the chroot
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| 20:55 | We just need to document it, that they need to be removed from .excludes
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| 20:55 | If someone does want to be unsafe...
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| 20:56 | (or better yet have a script + lts.conf option to regenerate them on boot)
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| 20:59 | <markit> yep, much better
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| 21:01 | <alkisg> 'night all
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| 21:01 | <markit> night, and thanks a lot
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| 22:49 | <dtrask> hey! Any BTS folks online?
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| 23:22 | * vagrantc wonders why http://ltsp.org/stories/ just shows invisible content | |
| 23:22 | <vagrantc> javascript?
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