hostname Command - Show or Set System Hostname

The hostname command displays or sets the system's host name. The host name is used to identify the system on a network.

Syntax

hostname [options] [new_hostname]

Examples

hostname

sudo hostname newhost

echo "newhost" | sudo tee /etc/hostname sudo systemctl restart systemd-logind.service

Notes

• Changing the host name may require root privileges.
• Permanent changes usually require editing /etc/hostname and restarting related services.
• On modern systems, use hostnamectl for persistent changes.