What functions does the systemctl command offer in Linux?

The systemctl command is a tool used to manage systemd systems and services. It has the following functions:

1. Start, stop, and restart a service using systemctl: systemctl start/stop/restart service_name.
2. Check the status of the service: systemctl status service_name
3. Enable/disable a service to start on boot: systemctl enable/disable service_name
4. Check if the service is set to automatically start on boot: systemctl is-enabled service_name
5. Check the service logs: systemctl status service_name or journalctl -u service_name
6. List the status of all services: systemctl list-units
7. Check the list of enabled services: systemctl list-unit-files
8. List the services that the service depends on: systemctl show -p Requires service_name
9. Check the detailed information of the service by using: systemctl show service_name
10. To view detailed information about an enabled service, use the command: systemctl show –all service_name

In addition to the functions mentioned above, systemctl can also manage the system’s targets (similar to traditional runlevels), control service resource limits, and other advanced functions.