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-elgg-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:02:42 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 1f1a4f952c8aee795423f60157768c148d64a224 * md5sum 8a3ee04ba5278cfcb4f16d78e0250fa3 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQL8qoAAoJEIXCXpWhbrlNkpgIAKtrGt/MiioiUzRQUVdEPvX4 lv+JH1CRhkzapOOa8JI5ACMhY8ZSTLxo1DUPMBUVPQLNpe2Qo5z4aLYZaN1ms2aR KE1r7r23VVqf3Gjg4Xu9zzoHJVc+XAzUaWn81Y3cQ8v9/Y76wbz2jS6D9YSr2c4R sE0WfIivlXU3g8NAJaBRFuFRkWX1ei0FBoWINWc9a3PTZJ+YtO+klIFXRV225Tkq 9uAbccx/TT0kwWpCg4T3SMFJSd4W2x+jLUJUsD5DUVKKANOGgetYCg3pO28pqggA eDES+P3PF0K7Q/zFAtfWZtjL98Lvygj7ZTXIpq37MkhgRiKvA3NDSbd75t63Pac= =l/j3 -----END PGP SIGNATURE-----