#!/tool/bin/perl -w
use strict;
use lib '/home/user/perl_modules/lib/perl5';
use My::Foo;

my $new_foo = Foo->new();

##</code><code>##

/home/user/perl_modules/lib/perl5
    My/
    CGI/
    Devel/
    Pod/
    ...

##</code><code>##

use lib '/home/user/perl_modules/lib/perl5';
use lib '/home/user/perl_modules/lib/perl5/My';
use Foo;