Change Hostname on ubuntu

$ iyankz@minez:-$

iyankz over as the username, as minez hostname. hostname is created when we install linux and difficult to change. I want to change, follow the steps below: if you want to change, just open the configuration file

$ sudo nano /etc/hostname

Alt+F2 (Run), type gksu gedit /etc/hostname

or kate,  

$ kdsu kate /etc/hostname

Happy Testing