Change Hostname in CentOS (permanent)

Some times you need to change the “hostname” of your CentOS Box, like for me I need to change the “hostname” when ever I clone my VM.

changing “hostname” involves easy steps

#
nano /etc/sysconfig/network
#

will show you some thing like

#
HOSTNAME=HOST-NAME.DOMAIN-NAME.COM
#

change the hostname to what ever you like, save the file and now You may need to edit the /etc/hosts (optional)


nano /etc/hosts

if you see output like following, you do not need to make changes in your host


127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

but in case you see something like this

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
77.30.0.38  HOST-NAME.DOMAIN-NAME.COM HOST-NAME

change the hostname here as well.

You are done, just restart the network to take effect of changes.

service network restart

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