On Thu, Jan 27, 2011 at 12:33:31PM +0530, Indunil Jayasooriya wrote:
# ssh-keygen -t rsa ( passphrase should be empty )
Don't use passphraseless keys unless you're using it for an automated tool (eg rsync kicked off from cron). If this is for human interactive work then learn how to use ssh-agent.
(If it's for programmatic use then also learn the from= and command= options on the public key to restrict what the key can do)