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)
Answer
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.
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