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How to change Ubuntu system's Hostname

Shaukat Mahmood Ahmad Shaukat Mahmood Ahmad Follow Mar 20, 2019 · 1 min read
How to change Ubuntu system's Hostname
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In this article I will explain how you can change ubuntu host name temporarily and permanently.

Set the system’s host name

Run following command from terminal to change system’s host name. Replace HOST_NAME with a name you want to set as new host name. This will change host name temporarily and will be reverted to original host name on system reboot. In next section I will explain how to change host name permanently.

hostname HOST_NAME

Change host name permanently

To change system’s host name permanently, we need to edit hostname and hosts files located in /etc directory.

Change hostname file

Run following command to change hostname file.

sudo nano /etc/

Above command will open hostname containing current host name.

CURRENT_HOST_NAME

Replace CURRENT_HOST_NAME with NEW_HOST_NAME.

NEW_HOST_NAME

Save the file by pressing Ctrl + O and exit the editor by pressing Ctrl + X keys.

Change hosts file

Open the hosts file for editing.

sudo nano /etc/hosts

hosts file contains mapping of hostnames to IP addresses.


127.0.0.1       localhost
127.0.1.1       CURRENT_HOST_NAME

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Change the CURRENT_HOST_NAME with NEW_HOST_NAME, after making these changing the hosts file will look as following.


127.0.0.1       localhost
127.0.1.1       NEW_HOST_NAME

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Save the file by pressing Ctrl + O and exist the editor by pressing Ctrl + X keys.

Finally reboot the system to load the new configurations.

sudo reboot

Thank you for reading. Please let me know (in comments section) if you have any questions.

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Shaukat Mahmood Ahmad
Written by Shaukat Mahmood Ahmad Follow
Hi, I am Shaukat Mahmood Ahmad, the author of SMA's blog and CTO / Co Founder at wizlinx.com