How to add your SSH keys to a node for passwordless auth

If you're looking to add your ssh keys to do passwordless authentication, use this command:

cat ~/.ssh/id_rsa.pub | ssh remote_username@server_ip_address "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

There is also an option to use:
ssh-copy-id -i ~/.ssh/id_rsa.pub remote_username@server_ip_address

If there is a diffrent public key that you want to specify, just make sure that you use the right path! Hope this helps!