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-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 16:14:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 255591eb34bf9538e425e4908c753ce2a8e54d3b * md5sum ac1483f30be08f9d31d8e5a1217394b3 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) iQEcBAABAgAGBQJSXWnRAAoJEIXCXpWhbrlNeFsH/3q7DH/sl+du0Y6nxqHjoGAv JLWzZKTcyI7TOs24vesWwvSFJnnhyBCWH/MKKujDLFJ2kdhbiuvMv16FXtXGNpNs D9zCWqv5ZTIt24A/tspxpB02zyDl+FGlRJdMZosyvDmdB6w05uI6LOSKsxpIX8d3 /Gjhgaw3e8Ay00utBHOMWs7qlCkbTuiqsGQdef7AH+OJFJtpVtGXu5hlxifhWwqO Usdl6rfLKGdTwc/GKhDghhVN2OOjHnuQSxMeHRHELDVlfZXIZODePBpREuFxw8qG RykpKrFbj+VrKnJw7AxJPV1JmM291snEWt//VeIo7aPOkdA54aoJATAlEXneYlw= =JzkX -----END PGP SIGNATURE-----