Lab 6: Changing Host Name

                                                                 Lab 6: Changing Host Name

Device or system host names are used to easily recognize a machine within a network in a human readable format.It is not much of a surprise ,but on Linux system,the host name can be easily changed by using simple commands as "Host name"

First login to the server by pem file and Ip address

If  you want to change the host name switch to root user

#sudu su-

Just run the command to know the host name

#hostname

It's difficult to remember the host name and all

So change the host name with easily recognize

Host name file will be locate in /etc/hostname in this path you can change the name

#vi/etc/hostname

Here you can see the host name

Just delete that line enter the name which you want

Just save  and come out of it

Run the command hostname -i to get the host name ip address

Just copy the ip address

You then have to add another record for the host name in:/etc/hosts

Without any modifying just enter ip address which you have copied and the name

Eg:<ipaddress>webserver

Save and exit the editor

Now run the command hostname -F/etc/hostname

Now check whether the hostname changed or not

Run the Command #hostname

My host name is changed

Execrise:

Launce 2 instance and change the hostname

1)give name as jenkins 

2)Give another name as tomcat