ssh host autocomplete

.bashrc

_complete_ssh_hosts ()
{
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    comp_ssh_hosts=`cat ~/.ssh/known_hosts | \
                    cut -f 1 -d ' ' | \
                    sed -e s/,.*//g | \
                    grep -v ^# | \
                    uniq | \
                    grep -v "\[" ;
            cat ~/.ssh/config | \
                    grep "^Host " | \
                    awk '{print $2}'
            `
    COMPREPLY=( $(compgen -W "${comp_ssh_hosts}" -- $cur))
    return 0
}
complete -F _complete_ssh_hosts ssh