Thank you Stephen Hedges and Ray for your response. MJ Ray wrote:

What is "Quick Install"?

http://koha.org/installation/quick-start.html

...

How to include /etc/koha-httpd.conf in httpd.conf.

Add the line: Include /etc/koha-httpd.conf to your main system httpd.conf file. The installer should have said that.

Installer said, and I tried, but I could not get the installation worked. Gain I will do on next working day, as on weekend that PC remain off. -- H. S. Rai