Starts or stops a VPN connection

vpn.sh

#!/bin/bash

set -e

conn_id=$(nmcli conn show | grep vpn | awk '{print $2}' | head -n1)
if [ "$conn_id" == "" ]; then
	echo "no VPN connection was found"
	exit 1
fi

is_active=$(nmcli conn show --active | grep "$conn_id" | wc -l)

if [ "$is_active" == "0" ]; then
	nmcli con up $conn_id
	exit 0
fi	

echo -n "there is an active VPN connection. disconnect? [y/N] "; read choice
if [[ "$choice" =~ [yY] ]]; then
	nmcli con down $conn_id
fi