Can you explain what the systemctl command is and what it is used for in managing system services?

The systemctl command is used to manage system services and daemons in systems with systemd (the modern init system in Linux). It allows you to start, stop, restart services, as well as enable or disable their automatic startup at boot.

Main features:

• systemctl start <service> — start a service.
• systemctl stop <service> — stop a service.
• systemctl restart <service> — restart a service.
• systemctl status <service> — view the status of a service.
• systemctl enable <service> — enable automatic startup of a service at boot.
• systemctl disable <service> — disable automatic startup.

Thus, systemctl is a versatile tool for managing the lifecycle of services in Linux systems with systemd.