Got minecraft host and doesn't know how to manage vps?
you can download putty in windows and linux.
in OS X is included in terminal.

OSX: use in terminal code "ssh username@hostname"
linux&windows: use putty with SSH connection and set required hostname, port, username and password.
easy? its not hard as you see.
Android like in phone: download connectbot, follow steps, thats it :)

then start server typing sh craftbukki.sh (whatever named)
and go in console typing screen-x