How to automatically log in to remote ssh servers using public/private keypair

As a user: 
 ~>ssh-keygen -t dsa 
 and enter your way through the prompts 
 The keys are stored in the .ssh/ directory in your home
directory. 
 -rw-------

1 pm users

668 2009-10-24 15:58 id_dsa 
 -rw-r--r--

1 pm users

601 2009-10-24 15:58 id_dsa.pub 
 id_dsa.pub is the public keyfile we are gonna place on the remote
server. 
 ssh-copy-id -i ~/.ssh/id_dsa.pub remoteserver 
 Enter your password for the remote server. 
 You should get: 
 Now try logging into the machine, with "ssh 'remoteserver'", and check in: 
  .ssh/authorized_keys 
 to make sure we haven't added extra keys that you weren't expecting. 
 Now try it for yourself: 
 ssh remoteserver 
 Et voila!