in reply to perl modules replication

At the very least you can use ExtUtils::Installed to determine what modules in which version you have currently installed:
use strict; use warnings; use ExtUtils::Installed; my $instmod = ExtUtils::Installed->new(); foreach my $module ($instmod->modules()) { my $version = $instmod->version($module); if ( $version ) { print "$module installed, version $version\n"; } else { print "$module installed, version not available\n"; } } __END__
Sort::Versions might be useful when comparing module "numbers".
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Andreas