From Electron Cloud
So for quick copying, to generate an SSH key pair on the client machine:
ssh-keygen -t rsa
and to send your client machine's key to any server on which you wish to be able to log in without a password (e.g. ~/bin/send-key):
#!/bin/sh cat ~/.ssh/id_rsa.pub | ssh -p 59721 root@${1} "cat - >> .ssh/authorized_keys"