hostname:tldr:0897a

The command "hostname" is used to display or set the hostname of a computer system. The hostname is a unique name that identifies a device on a network.

When used without any options, the "hostname" command simply displays the current hostname of the system. This is usually a combination of the computer's name and the domain name.

However, the command can also be used with options to change or set the hostname. For example, "hostname newname" will set the hostname to "newname". Note that in some systems, changing the hostname using this command requires administrative privileges.

The hostname is important in networking as it helps identify and locate devices on a network. It is used by other devices to establish connections or communicate with the computer in question.