Linux ‘who’ Command: Usage Guide

  1. View information about users currently logged into the system, including username, login time, login IP, etc.
  2. Check the system for the current number of active users and their login information.
  3. Check the terminal types of logged-in users in the system, such as tty terminals or pts pseudo terminals.
  4. Check for any abnormal logins in the system, such as unknown user logins or multiple logins by the same user.
  5. Monitor the login status of the surveillance system to promptly detect any abnormal or unauthorized login activities.
  6. Helping the administrator manage system resources, such as releasing idle terminals promptly to ensure the effective utilization of system resources.
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