Temporarily:

Step 1: Check the Current Hostname

First, you need to check the current hostname of the device by using the hostname command in terminal

hostname

Set the Hostname Temporarily

sudo hostnamectl set-hostname <name>

Verify Hostname Changes

You can verify the change in hostname by using the hostname or hostnamectl command in the terminal, which will display the temporary hostname we created.

hostname
hostnamectl

Permanently:

Step 1: Check the Current Hostname

First, you need to check the current hostname of the device by using the hostname command in terminal

hostname

Ensure you know the current hostname before making any changes. This command displays the current hostname of your Linux machine. We can see that the hostname of our machine is Kali.

Step 2: Check File Directories

You need to check the contents of these two file directories “/etc/hostname and /etc/hosts” and you will erase some content in these files and rewrite it in the next step.

cat /etc/hostname
cat /etc/hosts

Step 3: Edit /etc/hostname using Vi Editor

Use the sudo vi /etc/hostname command to enter into the vi editor and change the contents in the /etc/hostname file after entering into the vi editor follow these steps:

• Enter insert mode by pressing i.
• Delete the existing hostname and enter the new one.
• Save the changes by pressing Esc, then:wq!.

sudo vi /etc/hostname