x2go-dev June 2010

x2go-dev@lists.x2go.org

27 participants
92 discussions

new to the list, offering support
by Mike Gabriel 27 Jun '10

27 Jun '10

Hi there, my name is Mike Gabriel and I have recently taken a closer look at x2go. I must say, it is a fabulous project/product and as I will probably have needs for a SBC/TC environment like x2go I would like to offer support, skills and resources: o vhosts for testing (on root servers, available sometime in September/Octobre) this year) o webspace, db-storage, kolab groupware accounts o skills in Perl, Python, PHP o genuine skills in Ubuntu/Debian system administration o genuine skills in communication (at least I hope I have them) o I won't be much help with the x2goclient, but I think I can add great support to the server aspects of x2go... I live in Kiel, Germany and currently I am working on a SBC/Opensource concept for a couple of grammar schools herearound. During the testing of x2go I have stumbled over quite some issues that I would like to report to the current developer team. As I have found no bugtracker with the project, I guess addressing the x2go-dev list will be best, won't it? I would like to open a single thread per issue (as opposed to stuffing all issues into one longish mail). So discussion can wrap around each thread individually... As I understand a new release of x2go is coming up soon. Thus, I would like to avoid reporting deprecated issues/bugs/problems. Are there any release candidates, yet? Or is the git repository already up, so I can take a look into the sources? Let me know how I can support your team! Best and thanks for all the great work already performed, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 eMail-LeseSchreibStunde: wochentags 8h-10h mail: m.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Re: [X2go-dev] x2goplugin (was: Re: new to the list, offering support)
by Gerry Reno 27 Jun '10

27 Jun '10

1 0

skolelinux
by Tobias Knipping 27 Jun '10

27 Jun '10

hi all, i am very interested in using x2go with skolelinux (or the RLP Musterlösung). Are there any hints how to change skolelinux from ltsp to x2go? many thanks for this great project! Tobias

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x2go maemo fullscreen
by Karl-Wilhelm Ahlborn 27 Jun '10

27 Jun '10

Hello, I use the x2go client for maemo (N810, Diablo) for some days. It's a really fine piece of software, but I can't toggle fullscreen. Choosing the option has no effect. What am I doing wrong? -- kind regards Karl-Wilhelm Ahlborn

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Re: [X2go-dev] new to the list, offering support
by Gerry Reno 27 Jun '10

27 Jun '10

1 0

BUG-RERPORT: x2goprint will not work on NFS4/Kerberos HOMES
by Mike Gabriel 25 Jun '10

25 Jun '10

Hi there again, 2 issues with CUPS/X2GO printing... 1st issue: ========== when mounting home directories via NFS (NFS3 with root_squash, NFS4 with any kind of Kerberos security feature) you cannot copy a file as superuser ,,root'' to a user's HOME (x2goprint is called via sudo(NOPASSWD) in the cups-x2go backend). The logical error is in the last stanza of the x2goprint file... (quoted and marked below). Maybe there is already a solution for this. If not, let me know and I propose a suggestion (and test it with krb5p security enabled servers). <quote> my $mounts=`sudo x2gopgwrapper getmounts $session`; if( $mounts=~m/$spooldir/) { vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv move ("$printdir/$file", "$homedir/.x2go/C-$session/$file") or die "$!: Can't rename $file to $homedir/.x2go/C-$session/$file"; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ chown $uid, $gid, "$homedir/.x2go/C-$session/$file"; system ("su $user -c \"mv $homedir/.x2go/C-$session/$file $spooldir\""); open (RFILE,">$homedir/.x2go/C-$session/$file.ready"); print RFILE "$file\n$title"; close (RFILE); chown $uid, $gid, "$homedir/.x2go/C-$session/$file.ready"; system ("su $user -c \"mv $homedir/.x2go/C-$session/$file.ready $spooldir\""); } </quote> 2nd issue: ========== There is als some inconsistency between cups-x2go and x2goprint: cups-x2go: ---------- <quote src="/usr/lib/cups/backend/cups-x2go"> $tempFile = "$ENV{TMPDIR}/$jid-$uid-cupsjob$$"; </quote> BUT: $TMPDIR is not set, that's why first instances of CUPS's spool jobs appear in the server's root directory "/". Most important: by design $tempFile is a full path!!! x2goprint: ---------- $tempFile is picked up in x2goprint as $file <quote src="/usr/bin/x2goprint"> my ($user, $session, $file, $titleFile)=@ARGV; </quote> However, in x2goprint $file is interpreted as a filename without path... But maybe this problem als has been already addressed... I also get loads of stray job files on my x2goserver, especially if the print mechanism is not working by some reason (e.g. broken reverse ssh, because i was not able to configure my client properly... ;-) ) Greets, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 eMail-LeseSchreibStunde: wochentags 8h-10h mail: m.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Re: [X2go-dev] ENHANCEMENT-REQUEST: x2goclient -- option for reverse SSH port
by Gerry Reno 25 Jun '10

25 Jun '10

2 1

ENHANCEMENT-REQUEST: x2goclient -- option for reverse SSH port
by Mike Gabriel 25 Jun '10

25 Jun '10

Hi there, in the current x2goclient package (3.01-5, Debian, Qt version) there is need for an option to configure the reverse SSH port number (i.e. the SSH daemon's port on the client side). This option should be a client wide config option (not a per-session option). Printing and file sharing (sshfs/fuse) build up a reverse port forwarding tunnel from the x2goserver back to the client. This feature is used for x2goprint and x2gomountdirs (if I understand the perl code correctly) and could also be used for any other feature that could be evoked by a reverse SSH connection... The linux x2goclient, however, pre-requisites a running ssh daemon on the client system. Its standard port is 22. The x2goclient will only work if the client's SSH daemon runs on the default port 22. It will fail if the port has been set to a custom (high) port. Consider a client, whose system administrator has set the SSH port to a high --- to potential intruders unknown --- port number (e.g. 20222). With such an SSH setup, sshfs/fuse will fail... Reproduce: o modify /etc/ssh/sshd_config o set ,,Port 20222'' (or something else) o /etc/init.d/ssh restart o start x2goclient as some user and login to a remote x2goserver o start a shell within the x2go session on the server o type ,,mount | grep sshfs'' Suggestions: (a) add a global SSH port number option to the x2goclient (linux-only). (b) Another way for the x2goclient could be some autodetect code: lsof -ni | egrep "^sshd.*root.*IPv4" | awk '{ print $8 }' (c) Another way, similar to the windows client, could be to run a separate ssh instance that binds to a random port on the localhost lo-device only. That's where the reverse SSH tunnel (server -> client) has its endpoint. sshd -o ListenAddress 127.0.0.1:<someport> -o <someOtherOption> Hope to be of help, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 eMail-LeseSchreibStunde: wochentags 8h-10h mail: m.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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BUG-REPORT: x2goclient (Windows): pulseaudio missing pa_stream_proplist_update patch
by Mike Gabriel 25 Jun '10

25 Jun '10

Hi there, pulseaudio in x2goclient (Windows, 3.0.1-5) is probably missing a patch that was introduced on 2009/05/18. http://launchpadlibrarian.net/26903656/lp-348540-pulsesink.patch When connecting from Windows to Ubuntu Lucid, pulseaudio crashes once you start totem to play an mp3 or other file. A pop up error appears, stating: """ Es ist ein Fehler aufgetreten pa_stream_proplist_update() failed: Nicht untersützt """ Best, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 eMail-LeseSchreibStunde: wochentags 8h-10h mail: m.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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BUG-REPORT: login by non-x2gousers account increase server load
by Mike Gabriel 25 Jun '10

25 Jun '10

Hi there, here is a little --- what seems to me like a --- bug report... SERVER (Ubuntu Lucid) x2goserver-home: 3.0.1-1 x2goserver-one: 3.0.1-1 x2goserver: 3.0.1-5 CLIENT (Debian Lenny; Ubuntu Karmic/Lucid) x2goclient: 3.0.1-5 When logging in to the x2goserver with an account that is not in the x2gousers group on the x2goserver, I see hundreds of sudo errors in the auth.log file on the server (about 50-60, every 5 seconds): <quote> Jun 23 13:12:46 <hostname> sudo: <uid> : no tty present and no askpass program specified ; TTY=unknown ; PWD=<homedir> ; USER=root ; COMMAND=/usr/bin/x2gopgwrapper insertsession <pid> <fqdn.hostname> <session-id> </quote> To my understanding, the x2goserver should just say: ,,NO, you are not supposed to login, as you are not in the x2gousers group on this server... Goodbye and Farewell...'' Instead the x2goclient waits endlessly for a login... BTW: once you add a user to the x2gousers group the login from the x2goclient proceeds as normal... greets, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 eMail-LeseSchreibStunde: wochentags 8h-10h mail: m.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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x2go-dev June 2010