How to Change the Hostname in Debian

The hostname is the name of the computer as it appears to networking applications. Changing it only requires modifying a couple files in Debian.

1
Open a terminal window, TTY console, or secure shell to the Debian machine.
2
Enter "sudo nano /etc/hostname". Enter your password when prompted. This runs the nano text editor as root and opens the file.
3
Replace your current hostname with the one you want to change it to. Press Ctrl-O and then Enter to save it, and then press Ctrl-X to exit nano.

1
Enter "sudo nano /etc/hosts".
2
Find the line that starts with "127.0.1.1". Your old hostname should appear after it. Replace it with your new one, save, and then exit.
3
Enter "sudo reboot." Rebooting your computer ensures that all running applications will be using the new hostname.