SSH in to your debian server

ssh userName@your-server.ip.address or domain name

CHANGE HOSTN NAME IN HOSTS FILE

Using your favourite editor for linux terminal ( mine is nano, easy to use)

nano /etv/hosts

Once you execute the command you will see below file in edit mode.

Second line after the local loop IP agh is my current hostname, you can change it to whatever you desire.

Another syntax that can be used to change the hostname is below

nano /etc/hostname

change the name to your liking

Another syntax that can be used to change the hostname is below

hostnamectl sethostname NEW_HOST_NAME

Finally view your change or updated hostname by typing the following syntax in the terminal

hostname

OR

hostnamectl

Enjoy…