MD5: (lsof_4.69.gz) = 0396381588ec0f013074bbb651d2072a sum: 26674 48 lsof_4.69.gz You may need to use sum's -r option (or cksum -o1) to get a matching result. Even then the block count may not match, depending on the block size your sum (or cksum) program reports. The sum program that generated the above value considers block size to be 1,024. The most reliable authentication method is to use PGP with the detached certificate in lsof_4.69.gz.asc -- e.g., $ pgp lsof_4.69.gz.asc lsof_4.69.gz Victor A. Abell Tue Oct 14 10:48:38 EST 2003 .