To name host under linux PLEASE use minuscule letters.
Linux is case sensitive and you can do some mistakes under the FQDN(Fully qualified doamin name). If you need to change hostname in linux you must edit /etc/hostname and /etc/hosts.
Some examples and explain ;)
[root@evgacrunching /]$ hostname evgacrunching T.The name "evgacrunching" is my system's unqualified[ hostname.
There is another form, called the fully-qualified domain name, or FQDN. The FQDN is your system's hostname combined with its domain,
and you can use the hostname command to see the FQDN by giving it the -f option. On my system it prints this :
[root@evgacrunching /]$ hostname -f evgacrunching.example.com
From this example, you can see that the FQDN is just the unqualified hostname,
evgacrunching, combined with the domain,example.com, separated by a dot.
This is the fundamental form of all FQDN.
So if you replace /etc/hostname with the new desired name and /etc/hosts
with your newdesiredname changing the word evgacrunching and yourfqdn all is done:
127.0.0.1 evgacrunching.example.com evgacrunching localhost localhost.localdomain
<message edited by NerdGZ on Thursday, February 23, 2012 12:43 PM>