what he said.
It's as simple as
ssh-keygen -t dsa
then copy the key to the appropriate file on remote server
man ssh-keygen is your friend. the above command generates:
$HOME/.ssh/id_dsa.pub
Contains the protocol version 2 DSA public key for authentication. Th
+e contents of this file should be added to $HOME/.ssh/authorized_keys
+ on all machines where the user wishes to log in using public key aut
+hentication. There is no need to keep the contents of this file secr
+et.
though the man page says authorized_keys my experience says authorized_keys2. Use protocol 2, as you will be when you use dsa. preferable
