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How To Display a Summary of Running Services with Systemctl

Ubuntu 19

Systemd is an init system used in Linux distributions to bootstrap the user space and manage all processes subsequently, instead of the UNIX System V or Berkeley Software Distribution (BSD) style init processes. The systemctl command is a utility which is responsible for examining and controlling the systemd system and service manager. In this article, we will delve into how to use systemctl to display a summary of running services.

Quick Answer

To display a summary of running services with Systemctl, you can use the command systemctl list-units --type=service --state=running or simply systemctl --state=running. These commands will provide you with a list of all running services on your Linux system.

What is Systemctl?

Systemctl is a command-line utility that allows you to manage systemd system and service manager. It enables you to manage services, check statuses, change system states, and work with configuration files.

Displaying a Summary of Running Services

To display a summary of running services, you can use the list-units subcommand along with the --type=service and --state=running options. Here’s the command:

systemctl list-units --type=service --state=running

Let’s break down the command:

  • systemctl: This is the main command used to control systemd.
  • list-units: This subcommand lists all units systemd currently has in memory.
  • --type=service: This option filters the list of units to only include services.
  • --state=running: This option further filters the list to only include running services.

When you run this command, you’ll get a list of all running services on your system.

Simplifying the Command

If you want to simplify the command, you can omit the list-units subcommand. systemctl assumes list-units by default when you don’t specify a subcommand. Here’s the simplified command:

systemctl --state=running

This command does the same thing as the previous command. It lists all running units, including services, sockets, devices, and more.

Conclusion

Understanding how to display a summary of running services with systemctl is a crucial skill when managing Linux systems. It allows you to quickly see what’s running on your system and identify any services that may be causing issues.

For more information on using systemctl and other Linux commands, you can refer to the official systemd documentation.

What is the purpose of systemd in Linux distributions?

Systemd is an init system used in Linux distributions to bootstrap the user space and manage all processes subsequently.

What is `systemctl`?

Systemctl is a command-line utility that allows you to manage systemd system and service manager.

How can I display a summary of running services with `systemctl`?

To display a summary of running services, you can use the systemctl list-units --type=service --state=running command.

Can I simplify the command to display running services with `systemctl`?

Yes, you can omit the list-units subcommand and use systemctl --state=running command to achieve the same result.

Why is it important to display a summary of running services with `systemctl`?

Displaying a summary of running services allows you to quickly see what’s running on your system and identify any services that may be causing issues. It helps in managing Linux systems efficiently.

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