MD5 checksums are used to establish the integrity of internet
downloads. Using the provided MD5SUMS file gives you more
confidence in knowing the file you've downloaded is the same
as file we published.

The Download Validation File (MD5SUMS) contains a list of the ITIS download
files and their MD5 checksums. To use it, you must get the "Download
Validation File" as well as the database file you've chosen.

You can then verify whether your download was successful by
determining the MD5 checksum for your downloaded file and comparing
it to the checksum in the Download Validation File.

For Linux
  To determine the MD5 checksum for your downloaded file, open a command
  prompt and enter:

    md5sum your-downloaded-file

  Compare your downloaded file's MD5 checksum with the MD5 checksum listed in
  the Download Validation File (MD5SUMS).  If they are the same then the
  download was successful.

For Windows
  1. Open Powershell
  2. Type Get-FileHash <filepath> -Algorithm MD5. For example
  
  Get-FileHash <path to file on your system>\itisMSSql.zip -Algorithm MD5
  
  3. Check that the value returned matches the value the MD5 file you
     downloaded from the ITIS website (and opened in Notepad).

If you should have difficulty determining your MD5 checksum for your
downloaded file, then contact us at the ITIS Webmaster email address:

    itiswebmaster@itis.gov