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Questions[x11-forwarding](ubuntu)

Martin Hope
N0rbert
Asked: 2019-07-29 03:57:52 +0800 CST
  • 6

I have created the simpliest (minimal working example) Dockerfile to run graphical application on my Ubuntu 16.04 LTS host system with 19.10 insider container:

mkdir ~/docker-xclock

cat > ~/docker-xclock/Dockerfile << EOF
FROM ubuntu:19.10
RUN apt-get update
RUN apt-get install -y x11-apps
CMD xclock
EOF

Then created container with 

docker build -t ubuntu:xclock ~/docker-xclock

When I try to run this container it shows the error about display:

$ docker run ubuntu:xclock 
Error: Can't open display:

What is wrong?

xorg x11-forwarding container docker
Martin Hope
Alice
Asked: 2019-01-14 21:50:49 +0800 CST
  • 7

I have to machines running Ubuntu 18.10

When ssh -X to another computer

  ssh -X [email protected]

firefox and google-chrome could be opened at the current machine with firefox

firefox  
google-chrome

However, if tried to open the files manager with 

xdg-open .
#or
nautilus .

the file manager is launched from the desktop of remote machine rather than the current.

ssh x11-forwarding
Martin Hope
ITA
Asked: 2018-07-03 02:41:29 +0800 CST
  • 7

So after much trial and error I have managed to get X11 forwarding work. My desktop in the office is Ubuntu 16.04 LTS and I use XQuartz to ssh in from my MacBook Pro. When I ssh in, I get the following on the terminal:

Warning: No xauth data; using fake authentication data for X11 forwarding.
Welcome to Ubuntu 16.04.4 LTS (GNU/Linux 4.4.0-128-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

I know the X11 forwarding is working because I can get FireFox to forward, but its extremely slow and buggy.

Firefox forwards

But I cannot get Google Chrome to forward. The terminal gives the following on running the command google-chrome:

ATTENTION: default value of option force_s3tc_enable overridden by environment.
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
[10497:10497:0702/053002.891053:ERROR:gl_context_glx.cc(227)] Couldn't make context current with X drawable.
[10497:10497:0702/053002.891090:ERROR:gpu_info_collector.cc(63)] gl::GLContext::MakeCurrent() failed
[10455:10549:0702/053003.740008:ERROR:bus.cc(394)] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are "tcp" and on UNIX "unix")

and XQuartz just displays a blank window. On ctrl-cing the process and exiting the terminal further spews more error messages (which I can post if required). But can someone help me out and tell me what I am doing wrong or if I have not got x11 forwarding set up properly? I basically followed the procedure here (also xauth was already installed for me) so I just edited the configuration files.

xorg google-chrome x11-forwarding
Martin Hope
linux64kb
Asked: 2018-02-13 15:37:07 +0800 CST
  • 12

I've set up x-forwarding on an Ubuntu 16.04.3 server and although the forwarding works, every time I start a GUI application it reports the following error in the terminal.

(<app-name>:<pid>) LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Failed to execute child process "dbus-launch" (No such file or directory)

This is obviously not critical, but it isn't working as it should.

How can I repair this?

Edit I'm mostly trying to start Firefox.

server x11-forwarding 16.04
Martin Hope
JaR
Asked: 2012-01-17 10:05:45 +0800 CST
  • 9

I cant for the life of me get x11forwarding to work. I did everything 'by the book'... Both client and server is running ubuntu 11.04. Both have ssh, vnc, x11 and FW ports open

/etc/ssh/ssh_config

   ForwardAgent yes
   ForwardX11 yes
   ForwardX11Trusted yes

/etc/ssh/sshd_config

X11Forwarding yes
X11DisplayOffset 10

apt-get install xauth
xauth is already the newest version.
  • installed tightvncserver
  • ran xauth list
  • rebooted
  • connected with ssh server -Xvl user

echo $DISPLAY return blank xterm returns xterm Xt error: Can't open display:

xterm:  DISPLAY is not set
  • FW is open
  • VNCserver running
  • sshd running
  • X11 running
  • ssh config files ok
  • verbose output from ssh login shows all ok, no errors

Still nothing works...

So i did export DISPLAY=localhost:10.0 Then echo $DISPLAY returns localhost:10.0 but xterm returns xterm Xt error: Can't open display: localhost:10.0

Now here's the weird part. if i do export DISPLAY=:0.0 then xterm gives no error, but no GUI is displayed...

Tried everything except reinstalling the OS. Even reinstalled ssh and copied fresh config files from a working install...

Putting here the verbose output:

user@jupiter:~$ ssh -v -X [email protected] env
OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.0.1 [192.168.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_rsa-cert type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: identity file /home/user/.ssh/id_dsa-cert type -1
debug1: identity file /home/user/.ssh/id_ecdsa type -1
debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p1 Debian-1ubuntu3
debug1: match: OpenSSH_5.8p1 Debian-1ubuntu3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 31:52:3e:91:b2:b2:74:cf:3e:65:37:a7:78:b9:3a:9e
debug1: Host '192.168.0.1' is known and matches the ECDSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:4
debug1: ssh_ecdsa_verify: signature correct
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
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Trying private key: /home/user/.ssh/id_ecdsa
debug1: Next authentication method: password
debug1: Authentication succeeded (password).
Authenticated to 192.168.0.1 ([192.168.0.1]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Requesting authentication agent forwarding.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending command: env
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0
SHELL=/bin/bash
XDG_SESSION_COOKIE=5867400390852a975845598400000005-1329602079.30299-1173119600
SSH_CLIENT=192.168.0.14 34691 22
USER=user
SSH_AUTH_SOCK=/tmp/ssh-bPyNW11158/agent.11158
MAIL=/var/mail/user
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PWD=/home/user
LANG=en_US.UTF-8
SHLVL=1
HOME=/home/user
LOGNAME=user
SSH_CONNECTION=192.168.0.14 34691 192.168.0.1 22
_=/usr/bin/env
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 1960, received 1968 bytes, in 0.1 seconds
Bytes per second: sent 19601.4, received 19681.4
debug1: Exit status 0
x11-forwarding