Changing a hostname permanently in Ubuntu

Question

I want to create a shell script that can change the hostname of my Ubuntu permanently. Whenever I use the hostname New_hostname command, it returns to the original hostname after I restart the machine.

I found out that the only way I can change this permanently is by modifying the file in /etc/hostname and save it. Is there some way I can do this using a shell script only? I also have a password.

Solution 1

The hostnamectl combines setting the hostname via the hostname command and editing /etc/hostname. Unfortunately, editing /etc/hosts still has to be done separately.

hostnamectl set-hostname <new-hostname>

Solution 2

Type

echo "myNewHostName" > /etc/hostname

in any shell with root access near you..

You may also want to take a look at the file /etc/hosts, cf. http://pricklytech.wordpress.com/2013/04/24/ubuntu-change-hostname-permanently-using-the-command-line/.

Solution 3

In Ubuntu 18.04 LTS

Hostname changing via SSH is reverted after reboot in Ubuntu 18.04. Make permanent change as following way.

1. Edit /etc/cloud/cloud.cfg

sudo nano /etc/cloud/cloud.cfg

Set preserve_hostname to true

preserve_hostname: true

2. Run hostnamectl

hostnamectl set-hostname new-host-name

3. Reboot

sudo reboot

Solution 4

Change hostname permanently without reboot

/etc/hosts

127.0.0.1    persistent_host_name

/etc/hostname

persistent_host_name

Apply changes Immediately

$ sudo hostname persistent_host_name

Check changes

$ hostname
persistent_host_name

Solution 5

To chaneg the Hostname permanet in ubuntu machine

Go to :

 #vim /etc/hostname

Type the hostname inside the file you want to set for the machine

Then save and the file

After saving the document run this command

 # hostname -F /etc/hostname

Then edit the /etc/hosts file

 #vim /etc/hosts

type the ip hostname inside the file

Then Logout of of the machine and relogin into the machine

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Comments

[Mr-Programs]

what is the use of setting hostname in production When in production, I have seen some people do hostnamectl set-hostname <what-ever> later to put it in nano etc/hosts 99% tutorials omit this tho, what is the use of this? Found this link on the matter but still don't quite understand it. learn.akamai.com/en-us/webhelp/adaptive-media-delivery/…

[zzr99]

This is the only answer that actually works. Thanks