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[Example Usage • Option Summary]

The digest program returns a message digest for one or more files.

We list a few examples of the digest command here to illustrate its usefulness and ease of use. To get started, lets compute the message digest of these files:

  digest README.txt digest.rdf

Where digest.rdf looks something like this:

<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns:digest="http://www.wizards-toolkit.org/digest/1.0/">
  <rdf:Description rdf:about="README.txt">
    <digest:modify-date>2007-08-25T20:19:02-04:00</digest:modify-date>
    <digest:create-date>2007-08-25T20:19:02-04:00</digest:create-date>
    <digest:timestamp>2008-01-23T12:25:47-05:00</digest:timestamp>
    <digest:hash>SHA256</digest:hash>
    <digest:digest>78709afc0de69f51085675329dc44c8b475258c1e7fd29acea078347e641a020</digest:digest>
  </rdf:Description>
</rdf:RDF>

To determine if any files have been changed, use this command:

  digest -authenticate digest.rdf -

Only files that fail to authenticate are listed. Notice the dash at the end of the command line, a dash means print the output to the terminal.

The digest command recognizes these options. Click on an option to get more details about how that option works.