The command `systemctl restart sshd` is used to restart the...

The command systemctl restart sshd is used to restart the SSHD service (the SSH daemon) on a Linux system that uses systemd for service and process management. Here's a breakdown of what it does:

1. systemctl: This is the primary command used to interact with the systemd system and service manager, responsible for managing services, startup processes, and more.

2. restart: This argument tells systemctl to stop the specified service and immediately start it again. It is typically used to apply new configurations without requiring a reboot.

3. sshd: This refers to the SSH (Secure Shell) daemon. It's the service that allows remote login and secure communication over the SSH protocol.

In summary:

The command restarts the SSH service on the system. This is useful for applying changes in the SSH configuration file (e.g., /etc/ssh/sshd_config) or resolving issues with the SSH service without rebooting the entire system.