The host computer on which you install Oracle VM Manager must have the host name correctly configured (pingable). Make sure the computer's host name matches the host name in the /etc/hosts file. Use the following command to check the host name:
# hostname
Use a text editor to check the host name in the /etc/hosts file. For example, to use VI enter
# vi /etc/hosts
For example, if the computer's host name is hostname1.example.com, and the IP address is 10.1.1.1, the corresponding item in the /etc/hosts file should be:
10.1.1.1 hostname1.example.com hostname1