Does restarting sshd always keep existing sessions alive?

3

I booted a server and (too late) I discovered that some breaking change had been made to /etc/ssh/sshd.conf. Can I be reasonably sure that restarting sshd keeps existing connections ? (this was on solaris, but question also applies to ubuntu)

krosenvold

Posted 2009-10-25T15:56:49.263

Reputation: 6 237

Answers

5

You can be (reasonably) sure that your current connection will not break when you restart sshd. If you want to be on the safe side, simply send a SIGHUP to your running instance and it will re-read its configuration file.

innaM

Posted 2009-10-25T15:56:49.263

Reputation: 9 208

Indeed. Straight from the authoritative source sshd rereads its configuration file when it receives a hangup signal, SIGHUP. Tested with `

– Stéphane Gourichon – 2015-11-21T18:55:32.540

See also sshd -t Test mode. Only check the validity of the configuration file and sanity of the keys. This is useful for updating sshd reliably as configuration options may change.

– Stéphane Gourichon – 2015-11-21T18:57:23.093

Asked: 2009-10-25T15:56:49.263

Viewed: 2 121 times

Active: 2009-10-25T16:35:58.967