A quick way to append your public keys to a remote server's Authorized Keys File

The basic steps are:

1. Create an RSA key-pair.
2. Copy the public key to the remote server.
3. Add the public key to the authorized_keys file on the remote server. 

For generating the key use the command

ssh-keygen -t rsa

The following command does the steps 2 and 3.

ssh-copy-id user@host