ydotool requires that ydotoold be running in the background. Now to make this easier the developer ships a systemd
unit file with the project.
A systemd unit file contains code to direct systemd to handle a resource called a systemd service. A service can either
be : enabled or disabled. When enabled it can be started or stopped.
This file invokes ydotoold as a service and makes it run in the background so ydotool itself can be used.
When you initially download the package the service is disabled by default. You can check this by running :
