poweroff:tldr:a7c98

The command "poweroff --halt" is used to shut down the computer by halting all processes and powering off the system.

Here's a breakdown of the different components of the command:

• "poweroff" is a command that is used to initiate a clean shutdown of the computer. It sends an ACPI (Advanced Configuration and Power Interface) signal to the operating system, which in turn initiates the shutdown process.

• "--halt" is an option or argument that is passed to the "poweroff" command. It specifies that the system should be halted before powering off.

When you run the "poweroff --halt" command, it stops all processes running on the computer, saves any pending data, unmounts file systems, and then halts the system. Finally, it powers off the computer completely.

Note: Depending on the operating system and the privileges of the user running the command, you might require administrative privileges or superuser access to execute this command successfully.