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-tracks-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:39:30 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum e482079cb21914478226bc3792975a67b18267e2 * md5sum d88b86e86bd6de5942cd6ed2e64bdda5 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) iQEcBAABAgAGBQJQM4FxAAoJEIXCXpWhbrlNHO8H/2gkBfJpahaPSo69sgpt/Ktn r3Xtq1e+v6EEf6nYLVYFTUyzmxLTdYXDz0CUagpuHwdvd217n6vWpheofODN3A06 l2MDL8ulzrQRpV8EEqWm4/+1QM1r3K3E8r2gwnLHgon1sN/nAlbpvd0FAKqYIkqa D94NWuCsFFz6kj5vrdG1MzVzp0fJXW5PLhY9WLC5625qD39ZwukuZ5s0W6JEUUjs +jlkAXe6TwrMiXnTqlfDCLxjihW12+UvbLDY65I2fjICX//4A0idURJcYm0V9SlE c0vFDmN74j2CZ0fBcZuSykm5uTLED2S4gGL9ctsToz39iejQS4eYkk8+1w5pxjY= =8aiZ -----END PGP SIGNATURE-----