ssh key passwordless using bash

Question

I would like to use ssh key authentication. I have a file that contains:

ip location

ip location

etc

i have a bash script as follow :

 declare -A mylist
 declare -A myarray

 i=1

while read line ; do

        mylist[$i]=$(echo $line | awk '{print $1}')
        myarray[$i]=$(echo $line | awk '{print $2}')

((i++))

done <file.conf

for ip in "${mylist[@]}"; do
 for location in "${myarray[@]}" ; do

        ssh ${ip} tail -f ${location} > /home/log_${ip} 2>/dev/null &


 done

done

When i do this it asks me for password all the time.I have no idea how to generate a key can you please show me the steps.

Answer 1

Execute the following command from your host machine as the usual user. This will generate a public-private key for this user on that host.

ssh-keygen

The keys will by default be created under ~/.ssh and usually named as id_rsa (private key) id_rsa.pub (public key) Now the public key can be copied to any number of remote computers and all further secure log-ins to those hosts will not prompt for the password.

ssh-copy-id user@machine