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| | There are several ways to run X applications inside your [[container]]. | | There are several ways to run X applications inside your [[container]]. |
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| − | == X forwarding ==
| + | comment5, |
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| − | === Single application ===
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| − | | |
| − | To run an X application inside a [[container]], one needs simply to connect to a container with '''ssh -X''':
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| − | <pre>
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| − | host# ssh -2 -c blowfish -X user@address
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| − | </pre>
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| − | | |
| − | After login to container check that <code>$DISPLAY</code> variable is set and X11 forwarding is enabled:
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| − | <pre>
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| − | ve# echo $DISPLAY
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| − | localhost:10.0
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| − | </pre>
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| − | | |
| − | In case <code>$DISPLAY</code> is not set, make sure that X forwarding is enabled in <code>sshd</code> config inside container. In most Linux distros sshd configuration is stored in <code>/etc/ssh/sshd_config</code>. You should set parameter <code>X11Forwarding</code> to <code>yes</code>. Also container should contain <code>xauth</code> package, thus install <code>xauth</code> if it is missing (in Debian this is part of the xbase-clients package). After that, restart your sshd daemon:
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| − | <pre>
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| − | ve# /etc/init.d/sshd restart
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| − | </pre>
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| − | {{Note|Don't forget to reconnect after this}}
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| − | Now you can run X applications from your container:
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| − | <pre>
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| − | ve# firefox
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| − | </pre>
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| − | === Desktop ===
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| − | Note : If you want to run complete X window environment (including window manager), you should kill local window manager and run only pure X server. Secondly you should use '''-Y''' option when invoking ssh. And if you want to run gnome/kde/..., don't forget to increase [[UBC]] limits, 'cause default values are certainly too small for these monsters. ;)
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| − | You can run a desktop with ''xinit'' (on the node):
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| − | | |
| − | <pre>
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| − | xinit -e ssh -XCc blowfish user@ip_address "/usr/bin/xfce4-session &" -- :1 & disown
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| − | </pre>
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| − | | |
| − | * Substitute the window manager of choice
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| − | * Once xfce has started, you can then close the xterm if you like
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| − | Your node will be on Ctrl-Alt-F7
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| − | | |
| − | And your VM on Ctrl-Alt-F8
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| | == VNC for X desktop == | | == VNC for X desktop == |
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| | Change your display settings (don't forget to change them back after you establish a connection) | | Change your display settings (don't forget to change them back after you establish a connection) |
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| − | <pre>DISPLAY=:1.0</pre> | + | <pre>DISPLAY=:1,0</pre> |
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| | Forward your application or desktop over ssh to Xephyr | | Forward your application or desktop over ssh to Xephyr |
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| | ===== GDM ===== | | ===== GDM ===== |
| − | Edit the '''gdm.conf''' file and in xdmcp section, comment out the '''0=standard''' line under the [servers] section - this will prevent gdm from trying to launch an X server on the local machine - it will simply listen for xdmcp requests. Insert '''0=inactive''' in [servers] section. Insert '''Enable=1''' in [xdmcp] section. Also, change from VCAllocation=true to VTAllocation=false and comment out the FirstVT=7 line if that lines exists. Change the access restrictions (if any) to suit your needs and then start GDM. | + | Edit the '''gdm.conf''' file and in xdmcp section, comment out the 0=standard line under the [servers] section - this will prevent gdm from trying to launch an X server on the local machine - it will simply listen for xdmcp requests. Also, change from VCAllocation=true to VTAllocation=false and comment out the FirstVT=7 line. Change the access restrictions (if any) to suit your needs and then start GDM. |
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| | === Client/Host Configuration === | | === Client/Host Configuration === |