Change user within ssh session retaining the current MIT cookie for X-forwarding

su username -c "xauth add ${HOSTNAME}/unix:${DISPLAY//[a-zA-Z:_-]/} $(xauth list | grep -o '[a-zA-Z0-9_-]*\ *[0-9a-zA-Z]*$'); bash"
When you remotely log in like "ssh -X userA:host" and become a different user with "su UserB", X-forwarding will not work anymore since /home/UserB/.Xauthority does not exist. This will use UserA's information stored in .Xauthority for UserB to enable X-forwarding. Watch http://prefetch.net/blog/index.php/2008/04/05/respect-my-xauthority/ for details.

1
2010-04-02 10:08:25
su

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