md5sum.txt ========== Just download the required files, and put the md5sum-files in the same directory. For example - If you have the following two files: devilspie2_0.20-1_amd64.deb.md5.txt devilspie2_0.20-1_amd64.deb Do a command like this: > md5sum -c devilspie2_0.20-1_amd64.deb.md5.txt devilspie2_0.20-1_amd64.deb: OK > and it will hopefully output OK as in the example, which means the md5sum is OK, and the file is as it should be. For more information, see the man page for md5sum.