i downloaded a Linux distribution from a FTP site today, and i found there is a file named MD5SUM in the same directory, with the following contents:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
c9a4d963a49e384e10dec9c2bd49ad73 valhalla-SRPMS-disc1.iso
41b03d068e84d2a17147aa27e704f79b valhalla-SRPMS-disc2.iso
cb91810ce8173039fed24420407e4c59 valhalla-i386-disc1.iso
ec1b813d32ffdc8edc2be261735d17de valhalla-i386-disc2.iso
5dc81ce523cfddf99b4d4d63e91bcaa7 valhalla-i386-disc3.iso
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see
http://www.gnupg.org
iD8DBQE8z/oCIZGAzdtCpg4RAsMvAJ9+xOn4Pw1T0mp8zVT64cEDWuqqKwCfblTd
4Lw0SvJC+v/6JbGIxJWL7aA=
=0xs+
-----END PGP SIGNATURE-----
what's the usage of the file, and how i can use it?
Thanks!