bash ssh hosts auto completion

1. First of all you should have bash_completion module installed (usually it's installed by default in most Linux-based OS).
2. Disable host hashing. Set

"HashKnownHosts no"

in /etc/ssh/ssh_config (or ~/.ssh/config just for your profile)
3. Regenerate known_hosts:
   

   rm ~/.ssh/known_hosts

Now shell will 'remember' your ssh hosts and allow to use hosts auto completion.