ssh-keygen creates the public and private keys. ssh-copy-id copies the local-host’s public key to the remote-host’s authorized_keys file. ssh-copy-id also assigns proper permission to the remote-host’s home, ~/.ssh, and ~/.ssh/authorized_keys.
# ssh-keygen # ssh-copy-id -i ~/.ssh/id_rsa.pub <remote-host-address> wla ....... you ready to ssh without password
