How to exit IPMI SOL session without exiting the ssh session?

Question

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.

Answer 1

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: ‘~’) ...