What is the function of the ‘systemctl’ command in Linux?

The systemctl command in Linux is used to manage system services, allowing users to start, stop, restart, view, enable, and disable system services.

The specific functions are as follows:

1. Start the specified service, and use “systemctl stop” to stop the specified service.
2. Restart the specified service.
3. Check the status of the specified service, including information such as running status and main process ID.
4. Enable a specified service to run automatically at system startup; disable a specified service using ‘systemctl disable’ to prevent it from running automatically at system startup.
5. To view the list of services, you can use the command “systemctl list-units” to see all service units in the current system.
6. View the log information in the command to check the system service logs.
7. Other operations: systemctl also provides additional functions, such as reloading service configurations, reloading system configurations, and so on.

In conclusion, the systemctl command can assist users in managing system services, enabling easy operations such as starting, stopping, restarting, viewing, and configuring services.