How to Safely Shut Down Linux with the poweroff Command

poweroff: Shut Down the System

Function Description:

The poweroff command shuts down the computer operating system and cuts power. Use it when no users are logged in and all data is saved, and you need an immediate shutdown.

The shutdown record is written to the /var/log/wtmp log file.

Command Syntax:

poweroff [options]

Option Meanings:

The meanings of the command options are as follows:

-n : Do not perform sync before shutting down.

-w : Do not actually shut down; only write to /var/log/wtmp.

-d : Do not write the shutdown operation to the /var/log/wtmp log file.

-i : Close all network interfaces before shutting down.

-h : Set all hardware to standby mode before shutting down.

-f : Force shutdown.

Example:

Shut down the computer operating system and cut power:

# poweroff

Additional Knowledge:

How to view the /var/log/wtmp log file in Linux:

last -f /var/log/wtmp  // wtmp is a binary file; use the last command to view

Equivalent to executing:

last