How to Debug the CGI Codes

gopalr has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks,

I am new to CGI. I want to know, how to debug the CGI coding. In windows we can use PerlIDE to debug the code like that I want.

Now I am using the following to debug the CGI Code.

print STDERR $var;  #(we can show the value of $var in error_log file)
+;
[download]

Please let me know, is there any other way to debug the CGI Code.

I am using Linux and Apacher Server.

Thanks
Gopal R.