Create A Service

To run a script at system startup, we can use Systemd which is an init system for Ubuntu, and many other Linux Distros.

Usage

First of all, we need to create a service which can be done creating a system unit file with .service extension in /etc/systemd/system directory, with the followig content -

[Unit]
Description=My Custom Startup Script

[Service]
ExecStart={PATH_TO_SCRIPT}

[Install]
WantedBy=multi-user.target

For example /etc/systemd/system/scripter.service can be such file. Now to start the service, we can just run sudo systemctl start scripter, and sudo systemctl stop scripter to stop the service.

To enable the service at system startup, run sudo systemctl enable scripter.

Source: Transang