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-tomcat-apache-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 18:14:44 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 65f1aea86690e61b2e07adbeacac7919a6e8fab9 * md5sum 10fe9bfeeed5caeacd7198a76dfb5295 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) iQEcBAABAgAGBQJQL9uIAAoJEIXCXpWhbrlNStwIAMy5AroebB/ASAysmwEJAdUP ZSQW+MY+8jwnRJ1u4AN3BkI61SuAjy/6vh7ox2ffM8rYbczsFnYlP4qYbdj7+RM1 7w3yjnFDd3BAN+afvYJicw2XNoVJssNce0r2HronObYiurcuhEQLKp2ImOFy+Wm4 bfMPaZBLhAMiJ6mj6UIS8amOhwcSnhSHedJpp3Y8WdUuSNHancTRT7Yk4OfhCwLp VMCi1bPEOcf3oV5Xn8TP/uqWVEpJqbWEse/aJigSuZmkGYo+a7qnNE203oewMXbb gZj6GRRmpC7GLZD9h4LO8Ad3cltJ1GjytbCjPztStxpGiR6dYwvPj+OlhaVj3DE= =456V -----END PGP SIGNATURE-----