Debian modules

[Juan <usamge@facil.psi.br>]

Hi,

I would like to install:
 - Apache (???) It was installed via dselect, but I not found httpd
 - CGI (???) I think that I installed it via dselect
 - Perl: perl-5005.03-7.1
 - DBI Perl: libdbi-perl 1.13-3.deb
 - DBD mySQL: libdbd-mysql-perl-1.2202-4
 - MySQL Server: mysql-server 3.22.32-6
 - MySQL Client: mysql-client 3.22.32-6

and probably other modules that will be required. My problem is, how to 
know if this modules are included within the Debian distribution?

Which command must I have to use to install a .deb file?

TIA,
Juan.