function tmix () {
	set -o shwordsplit

	SESSION="${TMIX_SESSION:-TMIX}"
	SERVERS="${TMIX_SERVERS}"

	if [[ $1 == "kill" ]]; then
		echo "Killing tmux session $SESSION"
		tmux kill-session -t "${SESSION}"
	else
		if [ -z "$SERVERS" ]; then
	    # display usage if no parameters given
	    echo "Usage: tmix"
			echo "No servers configured. define them as TMIX_SERVERS=\"<SERVER> <SERVER> <SERVER>\" e.g. in ${ZDOTDIR}/lib/30-extras.zsh"
	  else
			echo "Creating tmux session $SESSION"
			tmux new-session -d -s "${SESSION}"

			create_session=$?
			if [[ $create_session = 0 ]]; then
				for SERVER in ${SERVERS}; do
					echo ">>> Connecting to ${SERVER}"
					tmux new-window -n ${SERVER} -t ${SESSION}:
					tmux send-keys -t ${SESSION}:${SERVER} "mosh ${SERVER} -- sudo tmux a -d" C-m
				done
			fi
	  fi
	fi
}