Hostname

  • “-”, “_ “, and “. " characters are allowed.
  • Up to 253 characters.
  • Stored in /etc/hostname.
  • Can be viewed with several different commands, such as hostname, hostnamectl, uname, and nmcli, as well as by displaying the content of the /etc/hostname file.

View the hostname:

hostnamectl --static
hostname
uname -n
cat /etc/hostname

Lab: Change the Hostname

Server1

  1. Open /etc/hostname and change the entry to server10.example.com
  2. Restart the systemd-hostnamed service daemon
sudo systemctl restart systemd-hostnamed
  1. confirm
hostname

server2

  1. Change the hostname with hostnamectl:
sudo hostnamectl set-hostname server21.example.com

  1. Log out and back in for the prompt to update

  2. Change the hostname using nmcli

nmcli general hostname server20.example.com