Debian based systems use the file /etc/hostname to read the hostname of the computer at boot time and set it up using the init script /etc/init.d/hostname.sh
We can edit the file /etc/hostname and change the hostname and then run:
/etc/init.d/hostname.sh start
Steps:
1. sudo vim /etc/hostname
2. Save the file with the hostname you like to set
3. sudo /etc/init.d/hostname.sh start
Ref: http://sysblogd.com/50/change-hostname-permanently-on-debian-or-ubuntu.htm
nJoy 😉