We can connect to IPMI serial over lan session by
ipmitool sol activate
and exit the session by
"~."
But "~." also exit the ssh session if you are in a ssh session.
"ipmitool sol deactivate" can disable the sol session without exiting the ssh session, but you need only another ssh session to do it.
Quick answer:
~~.
Explanation:
The ssh interprets the ~ character. So when you press just ~. then ssh thinks it is a request to close the session. Ssh does not forward these characters and closes the session. ipmitool is closed because the whole session is closed. If you want send the character ~ to remote system you need to escape it. Ssh man page says:
... A single tilde character can be sent as ~~ ...
So ~~. is forwarded as ~. and it is then interpreted in ipmitool.
Another option is to override the default escape character in ssh. Ssh man page says:
-e escape_char
Sets the escape character for sessions with a pty (default: ‘~’) ...
