ip link add dev wg0 type wireguard
wg setconf wg0 /etc/wireguard/wg0.conf
ip address add 172.16.6.4/24 dev wg0
ip link set dev wg0 up
ip route add 192.168.2.0/24 dev wg0

nano /etc/init.d/S50wg-client

#!/bin/sh
case "$1" in
  start)
        echo "Start my Wireguard connection"
        ip link add dev wg0 type wireguard
        wg setconf wg0 /etc/wireguard/wg0.conf
        ip addr add xx.xx.xx.xx/32 dev wg0
        ip link set up dev wg0
        ip route add xx.xx.xx.xx/24 dev wg0
        ;;
  stop)
        ;;
  restart|reload)
        "$0" stop
        "$0" start
        ;;
  *)
        echo "Usage: $0 {start|stop|restart}"
        exit 1
esac
exit $?

chmod +x /etc/init.d/S50wg-client