do as the following steps:
1)open a shell, tpye the command below:
[admingu@googe ~]$ sudo hostname googe
2)edit the file:/etc/sysconfig/network, change the value of 'HOSTNAME':
[admingu@googe ~]$ sudo vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=googe
3)edit the file:/etc/hosts, change the ip address and your hostname
[admingu@googe ~]$ sudo vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
#127.0.0.1 localhost.localdomain localhost
127.0.0.1 googe googe
