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bashkeyscp

Stop SCP from password prompt

I am trying to copy my profile to a list of servers ( 5K ). I am using a private key to get the authentication working. Everything runs smoothly and as expected but I have this small annoyance :

Sometimes a server does not accept my key ( thats ok, I dont care if a few servers dont receive my profile ) but as the same was rejected, a prompt pops up asking for password and stops the execution until I type CTRL-C to abort it.

How can I make sure SCP uses the key and ONLY the key, and never prompts for any password?

NOTE : Im planning to add an ampersand at the end so all the copies will be done in parallel later.

Code

#!/bin/bash

while read server
do
    scp -o "StrictHostKeyChecking no" ./.bash_profile rouser@${server}:/home/rouser/
    
done <<< "$( cat all_servers.txt )"
Solution

  • -B' Selects batch mode (prevents asking for passwords or passphrases)