This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-trac-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:34:20 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6744a58ce97dbc66417cfb318596b494aa4bdf6d * md5sum f8acc12876c1ec2b9ecbed5ba7d3e405 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSMtwVAAoJEIXCXpWhbrlNdFMH+wSTP/00qtkSd2pm4PWodzue AHqJ3jnJhNDH/hKg/aGX0VHE1CCTzBvBdJEc875I2PPVbVTN4HUyopB31F1u1HyQ us2gIZw5G/uw9XSBSWTVzvQMlmc5qViitvqxOMJ3Gpg9Ik/19TnUCCxt9GO3OaxV Vnr9BYbGeA0tYmBaIuZs4/O1gSPd12/TfRhUNezdQBPih9bYRwPHnDLUVUkmaq5l 17ijDjL0nMHaLKOBZxf0LNtyl0JlYdNN7JpHc4CWGc7Gx3u76T8eNrlP/yPJW/xE Xh+Qs93uhwEsFVv75dn0tic/u+Kn9dp6N34VbxAqSFPDVQkZwr/1bO+HLdClhw0= =x+oR -----END PGP SIGNATURE-----