Well. If either the path "/usr/share/snmp/ and, or the file snmp_perl_trapd.pl don't exist. You might take marto's advise, and see if waht your looking for, isn't part of a larger package. Like the one he mentioned. As you indicate you're using a flavor of Linux. Did you attempt to install it through your system's package manager? That route generally takes care of any dependencies automatically. Either way. At this point it appears that you've either chosen something that wasn't intended to be installed singularly, or you didn't choose the best route to get it installed (eg; via your system's package manager).

Best wishes.

--Chris

#!/usr/bin/perl -Tw
use Perl::Always or die;
my $perl_version = (5.12.5);
print $perl_version;