Creating a Startup Service

Use systemd to create a sratup service.

The following example shows you how to create a systemd startup service that changes the maximum transmission unit (MTU) of the default Ethernet connection, eth0.

1. Concatenate the following block of code into a file:

cat << EOF >> /lib/systemd/system/eth0.service
    [Unit]
    Description=Network interface initialization
    After=local-fs.target network-online.target network.target
    Wants=local-fs.target network-online.target network.target

    [Service]
    ExecStart=/usr/sbin/ifconfig eth0 mtu 1460 up
    Type=oneshot

    [Install]
    WantedBy=multi-user.target
    EOF

1. Set the service to auto-start when the system boots:

cd /lib/systemd/system/multi-user.target.wants/
    ln -s ../eth0.service eth0.service