in reply to DBD Module

Also may i know what exatly i need to follow when i install this modules

You need an Oracle client installation on your machine.

On most systems with CPAN installed, you can then do

perl -MCPAN -e'install DBD::Oracle';
Otherwise, unzip the tarball and do
perl Makefile.PL make make test make install
As usual. Then you will also be reminded that your really should read the README for specific details.

Update: it might help to know which UNIX variant and which C compiler you are using.

-- Joost downtime n. The period during which a system is error-free and immune from user input.