I'm half way through writing a nagios script and I've hit an annoyance with SSH.
According to the man page:
-q Quiet mode. Causes all warning and diagnostic messages to be suppressed.
Yet if I enable the quiet flag and then pass an invalid port, I still get an error:
$ ssh user@localhost -q -p test Bad port 'test'
This is a problem, because that will make that message the first line out and that's what is grabbed by Nagios. I need to output something like "Warning|SSH error" after picking up on a
!= 0 exit code from ssh, but the first line I can output on is going to be line 2.
How can I make SSH TRULY quiet?
Note: I wasn't sure whether to post this question on serverfault, on superuser or on stackoverflow. I went with serverfault as the user base are probably most experienced with cli SSH and cli scripting workarounds.