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Linux Hostname Command Guide

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Basic Information: Hostname is a unique name assigned to network-connected computers
Hostname allows device identification without IP address
Command syntax is simple with optional OPTIONS and HOST_NAME
Key Options: -s option displays only first part of hostname
-b option sets hostname permanently, defaults to localhost
-f option shows FQDN including DNS domain name
-i option displays network addresses related to hostname
-I option shows all network addresses on interfaces
Usage Examples: Check current hostname using simple command
Display short hostname with -s option
Change hostname temporarily with sudo
Change hostname permanently using hostnamectl
View NIS domain name with -y option
Display all network addresses with -I option
Check aliases with -a option
Get help with -h option
View command version with -V option