achiang@soy:~$ complete -p ssh complete -F _ssh ssh
achiang@soy:~$ dpkg -s bash-completion | egrep Status\|Version Status: install ok installed Version: 20060301-3ubuntu1
achiang@soy:~$ complete -p ssh
complete -F _ssh ssh
achiang@soy:~$ dpkg -s bash-completion | egrep Status\|Version
Status: install ok installed
Version: 20060301-3ubuntu1