finger

The finger command is a tool used in command-line interfaces to gather information about users on a remote system.

The finger command originated in the early days of Unix and was primarily used to get details about users logged into a system, such as their login name, full name, login time, idle time, office location, and contact information. It provides a quick way to check if a user is actively using the system or retrieve basic information about them.

Typically, the finger command is used by entering "finger" followed by the username or user's email address of the user you want information about. The output then displays the requested user information if available.

However, due to privacy and security concerns, the finger command is now rarely used on modern systems. Most operating systems disable the finger service by default to prevent unauthorized access to user information.