#! /bin/bash

# see https://linuxconfig.org/how-to-automatically-execute-shell-script-at-startup-boot-on-systemd-linux for How to automatically execute shell script at startup boot on systemd Linux 

# execute as su

## create /etc/systemd/system/network-service-restart.sh
echo '#!/bin/bash' > /usr/local/bin/network-service-restart.sh
echo 'service NetworkManager restart'  >> /usr/local/bin/network-service-restart.sh
echo 'service network restart'  >> /usr/local/bin/network-service-restart.sh 
chmod 744 /usr/local/bin/network-service-restart.sh


## create /etc/systemd/system/service-network-restart.service
cat << EOF > /etc/systemd/system/service-network-restart.service
[Unit]
After=mysql.service

[Service]
ExecStart=/usr/local/bin/network-service-restart.sh

[Install]
WantedBy=default.target
EOF

# Next, install systemd service unit and enable it so it will be executed at the boot time: 
chmod 664 /etc/systemd/system/service-network-restart.service
systemctl daemon-reload
systemctl enable service-network-restart.service

# If you wish to test your script before you reboot run:
systemctl start service-network-restart.service