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How to change hostname on Ubuntu?

May 23, 2022
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We can simply use the hostnamectl command to change hostname.

To see the current setting just typing the following command:

$ hostnamectl

Sample output:

   Static hostname: john-laptop
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 290d8c5548414c8795805bbc6a9ec305
           Boot ID: 07b317bb8fe248f9ab3bb6291394c72a
    Virtualization: xen
  Operating System: Ubuntu 20.04 LTS
            Kernel: Linux 5.4.0-1018-aws
      Architecture: x86-64

To change hostname from john-laptop to thien-laptop, use the following command:

$ hostnamectl set-hostname thien-laptop
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