The md5 checksums for each file in the archive are listed in the “File Info” link for each package or source file. md5 checksums are a security device that tells someone if a file has been modified after the md5 program is run on them. It is virtually impossible to modify a file and yet keep the same checksum. You will need to have the md5 program. The md5 packages supplied on this site will give you what you need. Run md5 on the file you download before you run gunzip on it and then check the result against the value in the package description. It is also possible for you to build your own md5 program if you don’t to trust the package here
If you find a difference between our md5 checksum numbers and what you get when you download, let us know, Do not try to install a package whose checksum does not match ours. If you do not find the checksum for the file you downloaded, please contact us.