# Services: systemctl

A service is a program that runs in the background with no window and starts when the computer does; on Linux, systemd runs them, systemctl status shows whether one is running, and sudo systemctl start, stop, restart, enable and disable change it now or at every start-up.

![Cheat sheet for the lesson Services: systemctl: A service is a program that runs in the background with no window and starts when the computer does; on Linux, systemd runs them, systemctl status shows whether one is running, and sudo systemctl start, stop, restart, enable and disable change it now…](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/3c60ad47a2ec4527a319543557c7f994.webp)

- Category: Bash
- Level: Journeyman
- Tags: daemon, linux, service-unit, systemctl, systemd, unix
- Updated: November 10, 2026

Source: https://www.ask-codey.com/cheat-sheets/bash-services-cheat-sheet