md5sum

For security sake, I need to verify that files downloaded from Internet are intact. Some web sites already provide the md5sum hashes of files for end users to check.

For Linux and Unix-type OS, md5sum is a standard command in shell environment. However, in Windows OS, Microsoft does not provide a single tool to verify file integrity. The good news is there is a program "md5sum.exe" available from a variety of web sites. It is run in DOS mode.

I also find another text-based tool "fsum.exe" from Slavasoft which works more or less the same as md5sum.exe. Wooo, another GUI tool is Hascalc also developed by Slavasoft. Instead of going to DOS text mode, just use a mouse to browse and click the files you want to check. Cool... isn't it ?