lastlog:tldr:30510

The command "lastlog --user ${username}" is used to display the last login information of a particular user on a Linux system.

Here's a breakdown of the command:

• "lastlog" is the command itself, which is used to retrieve the last login information.
• "--user" is an option or flag used to specify that we want to search for a particular user.
• "${username}" is a placeholder that should be replaced with the actual username of the user you want to check the last login information for.

When you run this command and replace "${username}" with the desired username, the system will provide details such as the login name, port, and time of the last login for that specific user. If there has been no previous login for the given user, it will display a message indicating that there is no last login recorded.