ssh access using public and private keys

1. Generate a key pair on your machine:
   
   $ ssh-keygen
   
   Enter the name of the files with the keys and passphrase (not necessary).


2. Add your public key to the list of authorized keys on the remote machine:
   
   
   cat ~/.ssh/id_rsa.pub | ssh user@machine "cat >> ~/.ssh/authorized_keys"


3. Set permissions on the remote machine:
   
   
chmod 700 ~/.ssh

chmod 600 ~/.ssh/authorized_keys