localhost.localdomain. This hostname will be shown on various services your new server will offer as well a it will be show on your command prompt such us:
[root@localhost ~]#To chnage your hostname simply edit
vi /etc/hostnamefile and inlcude name of your host.
For example to change hostname to "rhel7" the
/etc/hostnamefile will contain:
# cat /etc/hostname rhel7