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-jenkins-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Tue Jun 4 21:22:25 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c7dacf875995dcbd6ee4dcb665eed35a91a62eeb * md5sum 2b973ddf31f9982aa678a83ea832e4ac 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) iQEcBAABAgAGBQJRrlp4AAoJEIXCXpWhbrlNZa0IAMuun+A9WFZU9+jMRYnX8dai Fz7w2ywnlUuBBcDzc0N6nVnIZDEz6gwOue1DBrYJ/sHGbUhotDu7+dD+CFYTxuk2 NXhv54sdtFwgylKf3f7klTBsvXDSUAM0sXeA6OMeQ+bxffEw8vVkt1pjGWHM1Aec 5qTy18YPDG8r+eqklg4VvvI0CKVL9dTW+JPfSxbnsnJswwRP1hu2f02r77MM5Ggr jaxbUTFPnVfUjAAo+8KQeNPwUhRRAYVlV/aG5Pfc9R3K0zkevepek0d8YfDeUXSx baMiAonkt0R6z0IgTqHSfD/laXp5oR7yeXRJv+ePbHhUtqBDPdNjF+3Bl7nzf24= =nM4G -----END PGP SIGNATURE-----