How to change hostname in Linux
In order to change the hostname of your linux machine, you can do the following:
1) Edit file /etc/sysconfig/network using your favourite editor, say using vi.
[root@mycomp]# vi /etc/sysconfig/network
2) Look for the line with HOSTNAME in it and change the entry to the desired hostname
3) Save the file and restart xinetd service
[root@mycomp]# /sbin/service xinetd restart
That’s it! You have just changed your hostname in Linux platform