Which command checks the status of the SSH service?

The command that checks the status of the SSH service is "systemctl status ssh." This command is part of the systemd system and service manager, which is commonly used in modern Linux distributions for managing services.

When you run "systemctl status ssh," you receive detailed information about the SSH service, including whether it is active (running), inactive, or failed. Additionally, this command provides logs related to the service, which can be valuable for troubleshooting issues.

The other commands provided do not correctly reflect the standard method of checking the status of the SSH service in a systemd-managed environment. The command that appears similar but has a different syntax, "service ssh status," may work in older systems or those that use the init system, but it is less common in current distributions. "ssh status" is not a valid command in the context of checking service status, as SSH is primarily a client-side tool for making secure connections. Finally, "check ssh" is not a recognized command for service management in Linux.

Thus, "systemctl status ssh" is the correct and most widely applicable command for checking the status of the SSH service in the context of modern Linux distributions.