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→Video Demo
* First, X software uses SystemV IPC shared memory to exchange data between server and application, thus you'll have to run the whole stuff in IPC namespace;
* First, X software uses SystemV IPC shared memory to exchange data between server and application, thus you'll have to run the whole stuff in IPC namespace;
* Second, in order to be restored reliably, it's recommended to run VNC server, window manager and application in a PID namespace;
* Second, in order to be restored reliably, it's recommended to run [https://tigervnc.org/ VNC server], window manager and application in a PID namespace;
* Third, when started from shell they will inherit session ID and terminal from that shell, which might block dump.
* Third, when started from shell they will inherit session ID and terminal from that shell, which might block dump.
#!/bin/bash
#!/bin/bash
set -m
set -m
Xvnc :25 -v -geometry 800x600 -i 0.0.0.0 -SecurityTypes none &
Xvnc :25 -v -geometry 800x600 -interface 0.0.0.0 -SecurityTypes none &
pid=$!
pid=$!
trap "kill $pid; wait" EXIT
trap "kill $pid; wait" EXIT
== Launch VNC client ==
== Launch VNC client ==
After this you can start your favorite VNC client (viewer) to see what's inside the server. The latter would be visible on port 5925 (:25 argument).
After this you can start your favorite VNC client (viewer) to see what's inside the server. The latter would be visible on port 5925 (:25 argument). For example:
$ vncviewer localhost:25
[[File:Vnc.jpg|400px]]
[[File:Vnc.jpg|400px]]
Restore finished successfully. Resuming tasks.
Restore finished successfully. Resuming tasks.
== Video Demo ==
[https://www.youtube.com/watch?v=j4wlYY7lTDw Dumping video player with CRIU]
[https://www.youtube.com/watch?v=roJ91Kqeq5w Example how CRIU can dump and restore a TCP connections]
[https://www.youtube.com/watch?v=kjhuzSl6JYc Checkpoint and restore of Firefox with CRIU]
== See also ==
* [[Screen]]
* [[TCP connection]]
[[Category: HOWTO]]
[[Category: HOWTO]]