hostnamectl command

Detailed Explanation

hostnamectl is a tool provided by systemd used to query and change the system hostname and related settings. It provides a standardized way to manage hostnames across different Linux distributions, replacing the need to manually edit files like /etc/hostname and /etc/hosts.

Basic Syntax

hostnamectl [command]

Common Commands

Command	Description
status	Show current hostname settings (default behavior).
set-hostname [NAME]	Set the system hostname to [NAME].
set-icon-name [NAME]	Set icon name for host.
set-chassis [NAME]	Set chassis type for host (e.g., desktop, laptop, server).

Real-world Examples

View the current system hostname and system information:

hostnamectl

(or hostnamectl status)

Change the system hostname to "webserver-01":

sudo hostnamectl set-hostname webserver-01

Set the chassis type to "server":

sudo hostnamectl set-chassis server