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Is there a way to tell an already-running ssh session to forward X11 connections, if you've forgotten to supply -X on the command line? If so, how?
echristopherson
Posted 2012-07-21T19:25:03.010
Reputation: 771
ssh X11 forwarding after forgetting -X
Answers
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Not really; you'll want to disconnect and reconnect.
If you want to forward X sessions most of the time, then consider a bash alias such as:
alias ssh="ssh -X"
You can also set it permanently in ~/.ssh/config by setting ForwardX11 yes.
Michael Hampton
Posted 2012-07-21T19:25:03.010
Reputation: 11 744
I was afraid of that. I tried setting up port forwardings from within ssh by using the escape character
~after a newline, but I had no way to set up the Xauthority stuff. The main reason I haven't made such an alias until now is that every time I usessh -Xon Mac OS X, it delays for several seconds while it starts Xquartz at the beginning of the session. Since I don't usually need X I prefer not to forward it all the time. – echristopherson – 2012-07-21T22:57:16.027