Change Linux Hostname

Categorysysadmin
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How to change Linux Hostname

Display the Current Hostname

bash
hostnamectl

Change the Hostname

bash
hostnamectl set-hostname host.example.com
echo '127.0.0.1   host.example.com' >> /etc/hosts

Verify the Change

bash
hostnamectl
   Static hostname: host.example.com
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 2cc2688b8138434a81dd7b3133e66b2e
           Boot ID: e378a0971e9e415cb70e7e953a2362bc
    Virtualization: qemu
  Operating System: Debian GNU/Linux 9 (stretch)
            Kernel: Linux 4.9.0-7-amd64
      Architecture: x86-64