内容简介:file. Open the Terminal application and type the following commands to set or change the hostname or computer name on Ubuntu.The procedure to change the computer name on Ubuntu 20.04 LTS:
I am a brand-new Ubuntu Linux 20.04 LTS VM user. By default, my server name to ‘localhost’ during cloud installation, but now I would like to change the computer name to ‘ubuntu-2004-nixcraft’. Can you tell me how do I remove the localhost and set it to ubuntu-2004-nixcraft on Ubuntu 20.04 Linux? How do I change the Ubuntu computer name from ‘localhost’ to ‘ubuntu-2004-nixcraft’? Can you tell me more about Ubuntu Linux change hostname command?
One can use the hostnamectl command to view or set the Ubuntu 20.04 LTS server’s host name. The host name or computer name is usually at system startup in /etc/hostnamefile. Open the Terminal application and type the following commands to set or change the hostname or computer name on Ubuntu.
How to display the current Ubuntu hostname
Run the following command:
hostnamectl
Of course, you can use the echo command/printf command to print hostname too:
echo "$HOSTNAME" printf "%s\n" $HOSTNAME hostname
Finally, try thecat command on /etc/hostname
cat /etc/hostname
Ubuntu 20.04 LTS change hostname permanently
The procedure to change the computer name on Ubuntu 20.04 LTS:
- Type the hostnamectl command :
sudo hostnamectl set-hostname newNameHere
Delete the old name and setup new name. - Next Edit the /etc/hosts file:
sudo nano /etc/hosts
Replace any occurrence of the existing computer name with your new hostname. - Reboot the system to changes take effect:
sudo reboot
How to change hostname on Ubuntu 20.04 without a system restart
Let us view current computer name setting, just type the following command:
hostnamectl
Next change hostname from localhost to ubuntu-2004-nixcraft, enter:
sudo hostnamectl set-hostname ubuntu-2004-nixcraft
Verify new changes:
hostnamectl
Find your public or private IP address by running theip command:
ip a ip a s eth0
12: eth0@if13: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 00:16:3e:24:b3:08 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 10.105.28.43/24 brd 10.105.28.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::216:3eff:fe24:b308/64 scope link valid_lft forever preferred_lft forever
Update /etc/hosts file with that IP address such as 10.105.28.43 using a text editor such as vim command/nano command:
$ sudo vi /etc/hosts
OR
$ sudo nano /etc/hosts
Update/append:
10.105.28.43 ubuntu-2004-nixcraft
Make sure you replace all occurrence of the old computer name with your new one too. Save and close the file in vim .
Conclusion
You learned how to change hostname permanently when using Ubuntu 20.04 LTS server or desktop computer as per your project needs.
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