How To Change Hostname on Ubuntu 16.04 LTS

Change Hostname on Ubuntu 16.04 LTS

In this tutorial we will show you how to change hostname on your Ubuntu 16.04 LTS server. For those of you who didn’t know, Hostname is a label used to identify the machine and will help you to easily distinguish the server from another one. The hostname should be a Fully Qualified Domain Name (FQDN) and should point to the server IP address so you can access the server by using it.

This article assumes you have at least basic knowledge of linux, know how to use the shell, and most importantly, you host your site on your own VPS. The tutorial is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. If you are ready open up your terminal and follow through this tutorial, and in less than 10 minutes you will have changed your hostname on a Ubuntu 16.04 server.

Change Hostname on Ubuntu 16.04 LTS

Step 1. First I will check the current hostname by running “hostnamectl status” on the shell of my server:

hostnamectl status

The output on my system is:

[root@idroot ~]# hostnamectl status
   Static hostname: vps.idroot.us
         Icon name: computer-vm
           Chassis: vm
        Machine ID: d89865d34b5a4637a9a4ffokeocef6da02
           Boot ID: 56d1685056d743b39e57a7okeocefe467c
    Virtualization: vmware
  Operating System: Ubuntu 16.04 LTS
       CPE OS Name: cpe:/o:ubuntu:ubuntu:16.04
            Kernel: Linux 3.10.0-042stab120.3
      Architecture: x86_64

Step 2. Change and Set Hostname.

To change the hostname type the command:

hostnamectl set-hostname vps1.idroot.us

Check the host name again (Close the session and open new session using console):

[root@idroot ~]# hostnamectl status
   Static hostname: vps1.idroot.us
         Icon name: computer-vm
           Chassis: vm
        Machine ID: d89865d34b5a4637a9a4ffokeocef6da02
           Boot ID: 56d1685056d743b39e57a7okeocefe467c
    Virtualization: vmware
  Operating System: Ubuntu 16.04 LTS
       CPE OS Name: cpe:/o:ubuntu:ubuntu:16.04
            Kernel: Linux 3.10.0-042stab120.3
      Architecture: x86_64

In each of these configurations, you’ll need to be sure your hostname conforms to the standards for FQDNs (Fully Qualified Domain Names). The ASCII letters a – z, the digits 0 – 9, and the hyphen (‘-‘) are the only characters acceptable (the first character, however, cannot be a hyphen). You may also find it necessary (or useful) to include the domain name as well, in which case you would then also use periods (dots) to separate the hostname and the domain name (and top-level domain).

For more command options you can add the --help flag at the end.

# hostnamectl --help
hostnamectl [OPTIONS...] COMMAND ...

Query or change system hostname.

  -h --help              Show this help
     --version           Show package version
     --no-ask-password   Do not prompt for password
  -H --host=[USER@]HOST  Operate on remote host
  -M --machine=CONTAINER Operate on local container
     --transient         Only set transient hostname
     --static            Only set static hostname
     --pretty            Only set pretty hostname

Commands:
  status                 Show current hostname settings
  set-hostname NAME      Set system hostname
  set-icon-name NAME     Set icon name for host
  set-chassis NAME       Set chassis type for host
  set-deployment NAME    Set deployment environment for host
  set-location NAME      Set location for host

Congratulation’s! You have successfully change hostname. Thanks for using this tutorial how to change and set hostname on your Ubuntu 16.04 LTS (Xenial Xerus) system. For additional help or useful information, we recommend you to check the official Ubuntu web site.

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