Your PATH should be pointing at the directory, not the binary, and if you want your system to find that perl first, it should come first in the path. So e.g. PATH="/opt/perl-version/bin:$PATH"

Your shebang line is fine. You could also use "#!/usr/bin/env perl" to get the perl that comes first in your PATH.

You can use the regular CPAN to install modules. Check with "which cpan" that you're calling the right version, or call it explicitly via "/opt/perl-version/bin/cpan".

To install, this ought to work  /path/to/perl/bin/cpan Module Module

To install, this ought to work  /opt/perl-version/bin/cpan Module Module

To run your program you can use  /opt/perl-version/bin/perl program.pl

Or have as your shebang (first line in your file) #!/opt/perl-version/bin/perl -- then you can run the file like by typing  /path/to/your/file.pl or ./file.pl

Or prepend these dirs to your $PATH (this program will print them, you export in your shell or .bashrc/.profile as shown below)

#!/opt/perl-version/bin/perl --
use Config;
for my $bin( @Config{qw/ sitebin vendorbin bin/} ){
    $seen{$bin}++ or print $bin; }
}
__END__
export $PATH=/opt/perl-version/bin;...;...;...;$PATH
[download]

then perl yourprogram.pl runs /opt/perl-version/bin/perl yourprogram.pl

then a shebang of #!/usr/bin/env perl -- runs /opt/perl-version/bin/perl yourprogram.pl

Running your code from shell is discussed in the following Behind the GUI lives the Shell and perlintro / perlrun and UNIX Man Pages env, export

Thanks for replies, unfortunately perl doesn't see new installed module.

I added PATH="/opt/perl-5.16/bin:$PATH" to $PATH variable, saved.

When I ask: "which perl" I get repsonse "/opt/perl-5.16/bin/perl",

when I ask: "which cpan", I get resposne "/opt/perl-5.16/bin/cpan" #Hmm is it ok ? Should CPAN be located there ?

Then I install my module via "CPAN INSTALL MODULE" the whole proces goes ok, but my app doesn't see this new module in @INC and return:

Can't locate MODULE.pm in @INC (@INC contains: Plugins Modules . /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8) (..)

It is still looking in "/usr/lib/perl5", whats wrong ?

PS: When I change my shebang from "#!/usr/bin/env perl " to "#!/opt/perl-5.16/bin/perl" I get Internal Server Error.

What's wrong ? ;/

PS: When I change my shebang from "#!/usr/bin/env perl " to "#!/opt/perl-5.16/bin/perl" I get Internal Server Error. What's wrong ? ;/

Well, the webserver is not your shell, so $PATH is not the same ... use full paths, and then work through the checklists , brian's Guide to Solving Any Perl Problem, CGI Help Guide , Troubleshooting Perl CGI scripts ... More generic advice :) On debugging, verify everything, talk to teddybear ... checklists and more