How to change the host name of Linux computer

On a Linux computer, you can change the host name anytime you like following the method given below after opening a terminal window.

$ sudo vi /etc/hosts <enter>

127.0.0.1 mycomputer.mydomain.com <enter>
:wq

$ sudo vi /etc/hostname <enter>
Insert
mycomputer.mydomain.com <enter>
:wq

$ sudo hostname -F /etc/hostname <enter>

Now check if hostname has changed
$ hostname <enter>
Should return mycomputer.mydomain.com

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