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Old 11-08-2010, 10:15 AM   #1
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SSH RSA passphrase in script ?


when generating RSA public/private key pair, I gave a passphrase to protect the key.

When I now want to use this private key in a script to log on to the remote server via ssh and do something, how can I give the passphrase ??

Alternatively, is it possible to use a different private key without passphrase ? I doubt it, but it doesn't harm to ask.
Old 11-08-2010, 11:28 AM   #2
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What's the task at hand, is it going to be running as cron-job
for a system user?

You could use "expect" to script the pass-phrase, but that's
always a bad idea.

You could generate a new account and have it use a passwordless
key to connect to the same user (you can't -trivially- have
two key-pairs for one user).

You could use ssh-agent & ssh-add for the account in question,
which means you'd have to manually enter the passphrase when the
machine gets rebooted.


Last edited by Tinkster; 11-08-2010 at 11:30 AM.
Old 11-08-2010, 11:34 AM   #3
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Originally Posted by jonaskellens View Post

Alternatively, is it possible to use a different private key without passphrase ? I doubt it, but it doesn't harm to ask.
yes, you can use the -i parameter to specify a different identity file


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