netplan-reconnect.sh

#!/bin/bash
# sudo crontab -e
# insert at top of crontab: SHELL=/bin/bash
# */1 * * * * /bin/check-net >> /var/log/check-net.log 2>&1

if ! (/usr/bin/dig +short myip.opendns.com @resolver1.opendns.com > /dev/null) ; then
        echo $(date) - check-net failed. restarting...
        killall wpa_supplicant
        sleep 2
        /usr/sbin/netplan apply
else
        echo $(date) - internet looks OK
fi