Is there a way to disconnect from an SSH session that has become unresponsive without killing the whole terminal? Specifically I'm using konsole, and the machine I'm working with sometimes hangs, but doesn't actually die (thus killing the connection). So SSH just hangs and I have to close the terminal and open a new one to try to ssh back into it or do anything else. Is there a way to effectively ctrl+c out of an ssh session?
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2Do read this: What can I do when my SSH session is stuck?– ShubhamSep 29, 2018 at 19:48
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Related question: How can I keep my SSH sessions from freezing? - Unix & Linux Stack Exchange– user202729Dec 2 at 23:46
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3 Answers
One way is to use the ssh escape character. By default this is "~", but it can be set manually with -e option when invoking ssh or via EscapeChar in your ssh config. To kill the hung session this will often work:
~.
As pointed out by Gilles this is only recognized immediately after hitting Enter.
answered Oct 8, 2010 at 23:34
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28Actually this will work regardless of what is happening on the remote machine. What you've experienced is that
~is only active immediately after you've pressed Enter (otherwise it would be too intrusive). Oct 9, 2010 at 0:04 -
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1I was trying to
~^C, not understanding where to place the <kbd>Enter</kbd>, but~.(as.apparently means to quit) followed by enter did the trick.– mazunkiMay 15, 2020 at 21:56
Just to clarify, hope this helps newcomer.
Press Enter
Press ~ (this is shift + ` on a keyboard with US layout)
Press .
Cursor will return to local prompt.
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1@lucidbrot see Gilles' comment at unix.stackexchange.com/questions/2919/…; you wouldn't want
~being interpreted in the middle of UNIX command-line, for example.– Jeff Schaller ♦Jun 12 at 15:34
If you ever want to terminate all active ssh sessions you can use this command (assuming that only ssh is connected to port 22):
kill `sudo lsof -Pni :22 | tail -n1 | grep -wv sshd | awk '{print $2}'`
This command finds all processes connected on port 22, removes the banner of lsof command output, ignores the ssh daemon process and gets all the PIDs, then terminates those PIDs.
