Change Hostname Of A System

Typically, hostname of a system is stored in /etc/hostname, and we can change that by writing a new hostname in /etc/hostname file.

Method 1

1. Edit /etc/hostname with any text editor such as nano or vim, and replace the existing hostname -

$ sudo nano /etc/hostname

1. Save and reboot -

$ sudo reboot

Method 2

Using hostnamectl command we can also set hostname, following is an example -

$ sudo hostnamectl set-hostname Dell-G15-5515
$ sudo reboot

To display current hostname, we can use hostname command.

Source: CyberCiti