How to change Hostname / Domain name

​

Change Host Name / Domain Name on Debian server:

Step 1: vim /etc/hostname


Change domain name > Start this service


/etc/init.d/hostname.sh start

 

Step 2:  vim  /etc/hosts

​​Change the domain name eg:

127.0.0.1       localhost

127.0.1.1       tanjila.com     mail      > Save & Exit

 

Step 3: Vim /etc/postfix/main.cf  

Change the below lines

 

myhostname = mail.tanjila.com

and

mydestination = tanjila.com, mail.tanjila.com, localhost.tanjila.com, localhost

 

Step 4: Run this command:

sysctl kernel.hostname=NEW_HOSTNAME

 

Step 5: Restart server

Init 6

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