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Paranoid Penguin - Managing SSH for Scripts and cron Jobs

Issue 137

From Issue #137
September 2005

Jul 28, 2005  By John Ouellette
 in
Anything that you can do from a shell command, you can do remotely with SSH. Here's how to set up keys for effective, secure remote tasks from cron jobs and scripts.
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gyjanos's picture
Submitted by gyjanos on Tue, 08/09/2005 - 09:51.

My desktop at home is running constantly and my SSH identity is registered with ssh-agent. I save the variables SSH_AGENT_PID and SSH_AUTH_SOCK in a file (~/.ssh/env), so that cron jobs can source that file and use ssh happily. Of course it is a drawback the passphrase has to be entered (once) before the cron jobs start running. (In my case this is naturally the first thing to do right after boot-up (2-3 times a year...))

I got excited when i saw the explanation of the -q option of ssh, as that would have been exactly the thing i needed (do not leave log)... But that description belongs to sshd and not ssh. (The article indeed quoted sshd's manpage, but used it in the context of ssh. The similarities/differences of ssh/sshd options are indeed confusing sometimes...) Too bad...

Great article!

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