Which of the following commands is used to restart the Samba service?

The command to restart the Samba service is "systemctl restart smbd" because it specifically targets the SMB daemon, which is responsible for providing file and print services to clients using SMB/CIFS protocol.

In most Linux distributions that have adopted systemd as their init system, the "systemctl" command is the standard management tool for controlling system services. The 'smbd' service is the primary service that implements the SMB protocol, allowing files and printers to be shared over a network. By restarting 'smbd', you ensure that any changes to the configuration are applied without needing to reboot the entire system.

Using "service" is commonly found in older or non-systemd systems, and whereas both commands can manage services, "systemctl" provides more functionality, such as monitoring and dependency management, making it more appropriate for modern Linux system administration tasks.