bash script problem

noir911 · 04-07-2006, 05:27 AM

I am writing a small bash script which tries to connect the user to a server (server name is taken as a command line argument - $1) using SSH key.

It is supposed to try the first key & upon failure it should try the next one. But it exits if it cannot connect using the first key. The code looks something like this -

ssh -i key1 user@$1 || ssh -i key2 user@$1

Wells · 04-07-2006, 09:04 AM

You may want to try something more along the lines of this:

Quote:

#!/bin/bash
TEST=`ssh -i key1 user@$1`
if [ ! TEST ]; then
ssh -i key2 user@$1
fi

I am just coming up with this out of my head, and no testing is involved at all.

Something you may also want to think about, since it appears that what you are trying to do is authenticate using two different keys, so that if the location you are going to doesn't have the first key it tries the second key, is to simply import the first key into the location that doesn't have it.

95se · 04-07-2006, 10:11 AM

You can try something like, ssh -i key1 -i key2 user@$1, though I am not sure it will have the desired result. I'm guessing, even if the key is wrong, it's not returning w/ an error code, so the other half of the || doesn't execute. Run the first one where it will not go through, then type: echo $? -- that will show you the return value of ssh, if it's 0, your going to have to find some other way to see if it failed.