$ cd ~/.ssh $ ssh-keygen -t rsa ##

##

  $ ssh-copy-id -i on.pub 

##

##

 $ cd ~/.ssh
 $ ssh  cat ~/.ssh/on.pub >> authorized_keys

##

##

  $ ssh -i ~/.ssh/on 

##

##

  Host 
  Hostname 
  StrictHostKeyChecking no
  User 
  IdentityFile ~/.ssh/on