How to change the hostname of your linux virtual nodes india

Change Virtual Compute Nodes Hostname

Please follow the below steps to change the hostname of your Virtual Compute Node.

Login to your Virtual Compute Node as a root user.

To check the current hostname of your server, run the command

hostname

To change the hostname of your server, type new name followed by hostname

hostname new-name

Change the hostname under the path /etc/sysconfig/network

vi /etc/sysconfig/network

Edit the content of the file so that it looks like this

HOSTNAME=new-name

Ubuntu/Debian

Next, edit the /etc/hostname file and update hostname:

vi /etc/hostname

Edit the /etc/hosts file and update your old-host-name:

vi /etc/hosts

Immediately after executing the previous command, the hostname is changed, but the change will last only until the next reboot. To permanently change the hostname, the next step is to run the following command in your terminal

cd /etc/one-context.d/

This will take you inside the directory one-context.d

List the contents of the directory by running the following command,

ls -la

You will see the following result

drwxr-xr-x  2 root root 4096 Oct 26 19:48 .
drwxr-xr-x 72 root root 4096 Jan 21 15:04 ..
-rwxr-xr-x  1 root root 4433 Jan 15  2015 00-network
-rwxr-xr-x  1 root root 1991 Jan 15  2015 01-dns
-rwxr-xr-x  1 root root 1720 Jul 12  2016 02-ssh_public_key
-rwxr-xr-x  1 root root   28 Jan 15  2015 03-selinux-ssh
-rwxr-xr-x  1 root root   15 Jan 15  2015 04-mount-swap
-rwxr-xr-x  1 root root  614 Jan 15  2015 05-hostname
-rwxr-xr-x  1 root root  297 Jan 15  2015 99-execute-scripts

We need to move the directory 05-hostname to root folder. To execute this run the following command in the terminal.

mv 05-hostname /root/

Now your hostname is changed permanently.