Password-less SSH Login

WHY

Because you might want that some of your scripts to be able to login to a remote host and do stuff without storing your password...

HOW

#this is the LOCAL HOST setup
ssh-keygen -t rsa -b 1024 -f ~/.ssh/rsync-key

#this is the REMOTE HOST setup
#get the rsync-key.pub from the LOCAL HOST through some secure way on the REMOTE HOST
cat ~/.ssh/rsync-key.pub >> ~/.ssh/authorized_keys
chmod 700 ~/.ssh/authorized_keys

Be sure to enable public-key login in your sshd_config.

Use this to login:

ssh -i ~/.ssh/rsync-key -oPort=5522 user@remote_host -v

Enjoy.