Sometimes you might need setting up Password-less SSH for running script or for application where you dont want to use password everytime. Here is a quick method to setup password-less SSH.
a. Run this command on Machine1:
#ssh-keygen -t rsa
It will show you this output. Just press Enter throughout the queries asked.
Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again:
b. Let’s copy the key to remote Machine2:
#ssh-copy-id -i ~/.ssh/id_rsa.pub email@example.com
It will show you the following output.
Now try logging into the machine, with “ssh ‘firstname.lastname@example.org′”, and check in:
to make sure we haven’t added extra keys that you weren’t expecting.
c. Now passwordless SSH is ready. Just test by typing this: