For reasonable-sized files (ones that fit comfortably in system memory): load the file's contents into a perl scalar, say $foo. Then $fingerprint = md5($foo);

If you look through the documentation you have for it, you'll get some advice on other methods; e.g. (the object-oriented versions) : 

my $file ="/file/to/hash";
my $md5 = Digest::MD5->new();

$md5->addfile($file);
$md5->add("seekrit passwerd"); # not the best choice for one, but ...

my $digest = $md5->digest;

[download]

I got this straight out of the docs, more or less. HTH

Philosophy can be made out of anything. Or less -- Jerry A. Fodor

In reply to Re: Re: Re: Using MD5 and the theory behind it by arturo
in thread Using MD5 and the theory behind it by r.joseph

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.