EJPIC0067E

I am installing PortalExpress v 6.1.0.0 on RHEL 5.2 on my laptop.

Some tips -
Run install.sh -console

You may encounter EJPIC0067E error.
EJPIC0067E: {0} requires a fully-qualified host name that is recognized by the DNS server. Short host names, loopback addresses, IP addresses and illegal characters such as blanks are not allowed. Enter the host name again.
Explanation: This installation requires a fully-qualified host name. Short host names, loopback addresses, and IP addresses are not allowed.
User Response: Enter the host name again.

To resolve this -
Just check the complete name of your box
uname -a
for me it is
localhost.localdomain
Now -
vi /etc/hosts as root
edit localhost.localdomain to localhost.localdomain.com