4. how to change hostname of instance.md

Each EC2 instance has a hostname, which is a label assigned to the instance that identifies it on the network.

The hostname is used to identify the instance when it communicates with other instances or services in the network. For example, if you have a web application running on an EC2 instance, the hostname is used to identify the instance when it communicates with a load balancer that distributes traffic to multiple instances.

how to change it

launch the ec2 instance via connect or ssh method

login as sudo user sudo su

to know the details about hostname we type the command hostnamectl

now to change it we type

hostnamectl set-hostname rishi

2method

got to directory /etc/hostname

here we have our hostname stored we can change it using any editor like vim nano etc i am using nano here

nano /etc/hostname it will open the editor now change the name and save the file using ctrl +S ctrl + x { to exit the editor }

hostnamectl to view the changed name !!