This tip explains how to add port 81 or other non-standard port under Redhat. Without adding that apache web server won't be able to bind port other than 80, 443, 488, 8008, 8009, 8443.
This tip explains how to password protect certain area of your web site.
This is the case when you want allow access to some site or area of it from your office but have it password protected for others.
This tip explains how to scan localhost or another computer on the network for the available services.
The command required to be executed as root (superuser) otherwise you'll see some error like
