x2go-user April 2018

x2go-user@lists.x2go.org

19 participants
16 discussions

Clipboard stops working
by Norm Green 11 Mar '19

11 Mar '19

Hello List, I find that the clipboard stops working after a period of time. Specifically, copying from the windows desktop to the x2go window doesn't work because x2go thinks the clipboard is empty. I am copying from emacs on Windows to emacs on Linux. It doesn't matter how many times I select and copy on windows, x2go does not pass the clipboard contents to emacs on Linux. But if I disconnect from the server and reconnect, it works, using the same emacs windows. This is with x2go client 4.1.1.1 running on Win7, but it also happened on previous x2go client versions (4.0.x) . x2go server 4.0.1.20 is running on Ubuntu 16.04 Is this a known bug? Any way to fix it? Norm Green

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Connection timeout over high latency network links
by Brent Roman 08 Mar '19

08 Mar '19

I'm trying to run a remote X-session on a satellite link. The ping latency is typically 800ms. I have no trouble ssh'ing to the remote machine, but, whenever I try to connect a remote session via the x2goclient, it ends within a couple seconds with a dialog box saying: Timeout connecting to raven raven is the remote hostname. Both machines are running Debian Jessie. The x2goclient is version 4.4.1.0 Is there some connection timeout parameter that I could increase to make it possible to use high latency links? Is this fixed in newer versions? Thanks! -- Brent Roman MBARI Software Engineer Tel: (831) 775-1808 7700 Sandholdt Road, Moss Landing, CA 95039 mailto:brent@mbari.org http://www.mbari.org/~brent

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Re: [X2Go-User] ssh kex error
by is＠k4ts.net 13 Nov '18

13 Nov '18

Am 19.10.2015 17:06, schrieb Robert Dinse: > the new version of openssh disabled certain insecure > ciphers... Version7 is what you mean. I use 6.9 on both client and server. > you can add > the following line to your /etc/ssh/sshd_config manually enable the > insecure old ciphers: > > KexAlgorithms > curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 Adding these ciphers doesn't help - same algo error, Thats wired coz I can ssh to the server without any issues. > -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- > Eskimo North Linux Friendly Internet Access, Shell Accounts, and > Hosting. > Knowledgeable human assistance, not telephone trees or script > readers. > See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) > 246-6874. > > On Mon, 19 Oct 2015, is(a)k4ts.net wrote: > >> Date: Mon, 19 Oct 2015 15:12:43 +0200 >> From: is(a)k4ts.net >> To: x2go-user(a)lists.x2go.org >> Subject: [X2Go-User] ssh kex error >> >> hi, i'm not able to connect >> to my new hardened gentoo server using x2go. >> >> No matter which key type i select for the connection, >> the client (v. 4.0.5.0) terminates with the following: >> >> kex error : no match for method server host key algo: >> server [ssh-rsa,ssh-ed25519], client [ecdsa-sha2-nistp256] >> >> I have rsa and ed25519 keys on my client and server. >> >> sshing from the shell works like always. log is attached. >> >> do you have an idea, whats might wrong? >> >> thx, >> k4t >> >> k4tfish@e10 ~ $ ssh k4tfish@host >> OpenSSH_6.9p1-hpn14v5, OpenSSL 1.0.2d 9 Jul 2015 >> debug1: Reading configuration data /etc/ssh/ssh_config >> debug1: Connecting to host.net port 51822. >> debug1: Connection established. >> debug1: identity file /home/k4tfish/.ssh/id_rsa type 1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_rsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519 type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519-cert type -1 >> debug1: Enabling compatibility mode for protocol 2.0 >> debug1: Local version string SSH-2.0-OpenSSH_6.9p1-hpn14v5 >> debug1: Remote protocol version 2.0, remote software version >> OpenSSH_6.9p1-hpn14v5 >> debug1: match: OpenSSH_6.9p1-hpn14v5 pat OpenSSH* compat 0x04000000 >> debug1: Authenticating to host...net:51822 as 'k4tfish' >> debug1: SSH2_MSG_KEXINIT sent >> debug1: SSH2_MSG_KEXINIT received >> debug1: AUTH STATE IS 0 >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: server->client chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: client->server chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY >> debug1: Server host key: ssh-ed25519 SHA256:xyz >> debug1: Host '[host.net]:51822' is known and matches the ED25519 host >> key. >> debug1: Found key in /home/k4tfish/.ssh/known_hosts:203 >> debug1: SSH2_MSG_NEWKEYS sent >> debug1: expecting SSH2_MSG_NEWKEYS >> debug1: SSH2_MSG_NEWKEYS received >> debug1: Roaming not allowed by server >> debug1: SSH2_MSG_SERVICE_REQUEST sent >> debug1: SSH2_MSG_SERVICE_ACCEPT received >> debug1: Authentications that can continue: >> publickey,password,keyboard-interactive >> debug1: Next authentication method: publickey >> debug1: Offering RSA public key: /home/k4tfish/.ssh/id_rsa >> debug1: Server accepts key: pkalg ssh-rsa blen 279 >> debug1: Authentication succeeded (publickey). >> Authenticated to host ([123.123.456.7]:51822). >> debug1: Final hpn_buffer_size = 2097152 >> debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 >> debug1: channel 0: new [client-session] >> debug1: Enabled Dynamic Window Scaling >> debug1: Requesting no-more-sessions(a)openssh.com >> debug1: Entering interactive session. >> debug1: client_input_global_request: rtype hostkeys-00(a)openssh.com >> want_reply 0 >> debug1: Sending environment. >> debug1: Sending env LC_COLLATE = C >> debug1: Sending env LANG = en_US.utf8 >> >> _______________________________________________ >> x2go-user mailing list >> x2go-user(a)lists.x2go.org >> http://lists.x2go.org/listinfo/x2go-user >>

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It might be that we already have KDE5/Plasma support ...
by Stefan Baur 01 Oct '18

01 Oct '18

Hi $LIST, According to Mike#1, who currently attends DebConf in Montreal, Debian 9 + X2Go Stable + KDE5/Plasma have been shown to work together. This is a single report so far, though. If anyone is willing and able to test and confirm this, it would be highly appreciated. Another test result we'd be interested in would be what happens if you use Arctica NX-Libs and X2Go Heuler instead of X2Go Stable. Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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X2go session won't connect
by Paul Borowicz 03 May '18

03 May '18

I've been wrestling with a strange error that only seemed to be affecting my Linux laptop (OpenSUSE Tumbleweed), connecting to my Linux server (OpenSUSE LEAP). Sessions seemed to start, but wouldn't connect. If I tried to connect a 2nd time, it appeared to offer me an existing session, but would not connect. The client scrolled errors related to "unknown remote host 'localhost', and "unable to resolve remote host 'localhost'. Turned out I had removed the localhost entry from my /etc/hosts file. ------------ /etc/hosts 127.0.0.1 localhost --------- Adding this back, fixed this problem. I'm sending this email in case it is helpful to others. I couldn't seem to find any documentation mentioning localhost. Paul Borowicz

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X2Go TCE classic fails / use TCE-Live instead?
by Jens Bürger 02 May '18

02 May '18

Dear people of X2Go, I did a fresh install of Debian 9 in a VM. I installed X2Go as stated here: https://wiki.x2go.org/doku.php/doc:installation:x2goserver Then I tried to install the thin client environment as explained here: https://wiki.x2go.org/doku.php/wiki:advanced:tce:install I did not manage to get it running. First, I tried x2gothinclient_create with mainly the default options. The process aborted, in between 404s came up because the x2go-repos apparently don’t have wheezy support anymore. Then I switched to stretch and tried again. This seemed to work out, but the following links in /srv/tftp are broken (i.e. the files are missing) pxelinux.0 -> /usr/lib/syslinux/pxelinux.0 vesamenu.c32 -> /usr/lib/syslinux/vesamenu.c32 memtest86+.bin -> /opt/x2gothinclient/chroot/boot/memtest86+.bin In a third try, I changed the release to jessie and started x2gothinclient_create over. The process then aborts with unmet dependencies of x2goclient-chroot… I meanwhile noticed the existence of TCE Live, but stating "This page is very much Work in Progess. Please leave a note on x2go-user(a)lists.x2go.org if you're interested in trying this out, so we can guide you along if something goes wrong.“ So, here I am :) My first question is: what is the recommended method for thin client environment? What do I need to consider if I want to use the Live method? Kind regards, Jens

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X2Go gathering 2018
by Christoph 26 Apr '18

26 Apr '18

Hi there, On a recent Linux podcast (TuxRadio) I heard that the project is looking for org support for the upcoming 2018 gathering. Who's the point of contact for this from the project? Please reply directly to this email address so we can have a chat of how I could be of help. Thanks, Chris -- This email account is monitored seven days a week.

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Re: [X2Go-User] Unable to start firefox docker inside x2go
by Bas van den Heuvel 16 Apr '18

16 Apr '18

No it only works on the console (through spice/vnc in this case, but display is :0 ) and I need to do a 'xhost +' first (not needed on my laptop strangely) With the x2go remote display it simply don't work (not via unix socket, or tcp or hard coded $DISPLAY with the IP of the docker host) On 16-04-18 16:05, Ulrich Sibiller wrote: > Hmm, if it works with xhost+ this looks like a cookie issue. Do you > have the matching cookie in your docker session (xauth list)? > > Uli > > On Mon, Apr 16, 2018 at 3:28 PM, Bas van den Heuvel > <bas(a)better-it-solutions.nl> wrote: >> I've tried all variations of $DISPLAY. >> >> Also tried to use xhost+ etc. etc. >> >> and my firefox docker contains the X unix socket. >> >> It works on my laptop without additional work (same docker version) >> >> It works on the x2go machine (connected through VNC/Spice) when I issue >> xhost + first >> >> It simply doesn't work when I use the x2go display >> >> Any ideas ? >> >> It worked before, just don't know what did change >> >> >> >> On 14-04-18 01:43, Mihai Moldovan wrote: >>> * On 04/13/2018 01:54 PM, Bas van den Heuvel wrote: >>>> In the past, I edited /usr/bin/x2gostartagent and removed the "-nolisten >>>> tcp" part, and edited /etc/x2go/x2goagent.options to remove "-nolisten >>>> tcp" >>>> >>>> It's not working, even a simple xeyes docker fails to open display: >>>> >>>> vdheuvel@arthur:/data/home/vdheuvel$ docker run --rm -it >>>> --net=host -e DISPLAY -v $HOME/.Xauthority:/root/.Xauthority >>>> fr3nd/xeyes >>>> No protocol specified >>>> Error: Can't open display: :50.0 >>> Makes sense, since it sounds like the UNIX socket is not passed through to >>> the >>> container. >>> >>> I'm not sure why your TCP workaround worked in the past, though. The >>> DISPLAY >>> syntax should be local-socket-specific (either UNIX socket or abstract >>> UNIX >>> socket), without a fallback to TCP. >>> >>> To use TCP connections, you'd have to specify DISPLAY=localhost:50. >>> >>> >>> The more curious thing here is that normally Xlib tries to connect via an >>> abstract UNIX socket, which theoretically should be also available in a >>> container - unless docker prohibits that, which would be plausible for >>> security >>> reasons. >>> >>> >>> >>> Mihai >>> >> _______________________________________________ >> x2go-user mailing list >> x2go-user(a)lists.x2go.org >> https://lists.x2go.org/listinfo/x2go-user

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Unable to start firefox docker inside x2go
by Bas van den Heuvel 16 Apr '18

16 Apr '18

Hello, Since version 4.1 I'm unable to start a docker inside x2go which uses X. (Ubuntu 16.04 x64 x2goserver from ppa In the past, I edited /usr/bin/x2gostartagent and removed the "-nolisten tcp" part, and edited /etc/x2go/x2goagent.options to remove "-nolisten tcp" It's not working, even a simple xeyes docker fails to open display: vdheuvel@arthur:/data/home/vdheuvel$ docker run --rm -it --net=host -e DISPLAY -v $HOME/.Xauthority:/root/.Xauthority fr3nd/xeyes No protocol specified Error: Can't open display: :50.0 From my laptop it works without problems. Anyone ? Thanks ! Regards, Bas van den Heuvel

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Re: [X2Go-User] x2go stops working on some Ubuntu 14.04 boxes
by Qianqian Fang 15 Apr '18

15 Apr '18

hi Mihai and other x2go users, I am wondering if you have any further comments or suggestions, I am still unable to connect to more than half of my servers. All failed in the same messages: *On the client side:* |Connection failed.||Failed to start X2Go Agent session with ID fangq-...._stDXFCE_dp24. X2Go Agent terminated unexpectedly. Aborting session startup. | *on the server side:* |Info: Agent running with pid '4112'.||||Session: Starting session at 'Tue Apr 10 01:15:16 2018'.||||Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-fangq/C-fangq-...._stDXFCE_dp24/options:51''.||||Session: Aborting session at 'Tue Apr 10 01:15:16 2018'.||||Session: Session aborted at 'Tue Apr 10 01:15:16 2018'.| all updated with the latest version of Ubuntu 14.04 Qianqian On 03/26/2018 10:46 PM, Qianqian Fang wrote: > On 03/26/2018 10:44 PM, Mihai Moldovan wrote: >> Looks good, all old packages are in rc state (i.e., uninstalled, but not purged). >> Sorry, that should have been ls -ldh /usr/lib/*86*/nx/X11/* >> >> I'm interested in the files in there. > > here you go > | > ||*fangq@zodiac:~$ ls -ldh /usr/lib/*86*/nx/X11/**|| > ||lrwxrwxrwx 1 root root 20 Mar 17 08:41 > /usr/lib/x86_64-linux-gnu/nx/X11/libX11.so.6 -> ../../libNX_X11.so.6|| > ||lrwxrwxrwx 1 root root 24 Mar 17 08:41 > /usr/lib/x86_64-linux-gnu/nx/X11/libX11.so.6.3.0 -> > ../../libNX_X11.so.6.3.0| > > >> >> Like the other user on the mailing list wrote, purging sessions can be done >> using rm -vf /var/lib/x2go/x2go_sessions; x2godbadmin --createdb (both as root), >> but if there are no sessions currently that won't do anything useful. > > I see. are there other logs that I can find/provide to narrow down the > issue? > > thank you again for your help. > > Qianqian > >> >> >> Mihai >>

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x2go-user April 2018