Finding out the type of a variable in Perl
if(ref $variable eq 'HASH') { ... }
You can use "HASH', 'ARRAY', 'SCALAR' etc.
How do I touch a file in Perl?
my $l_now = time(); utime($l_now, $l_now, "VersionNo.rc");
How do I use HTTP proxy applications like PPM?
set HTTP_proxy=http://10.1.15.33:8080/ ppm