halt:tldr:4446b

The command "halt --wtmp-only" is a command used in Linux systems to shut down or halt the system and update the wtmp file only.

Here's an explanation of each part of the command:

• "halt" is a command used to initiate a system shutdown or halt process in Linux. It stops all processes, closes all open files, and performs the necessary actions to safely bring down the system.

• "--wtmp-only" is an option or parameter that is passed to the "halt" command. In this case, it instructs the "halt" command to only update the "wtmp" file without actually shutting down or halting the system. The wtmp file is a log file that keeps track of system login and logout information.

So, when you execute the "halt --wtmp-only" command, it will update the wtmp file to record the current system state or user logins without performing a complete system shutdown. This can be useful in situations where you want to update the wtmp file without rebooting or halting the system.