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 debian-7-turnkey-jenkins_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 08:58:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 79ab726502aa7e96aa4f3532400fea6a82ce900a * md5sum 4c2d33f024f68352e997985ed78ad72a 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) iQEcBAABAgAGBQJSXlUfAAoJEIXCXpWhbrlNLNMH/ippC1h6/9wWelioxvDsuRg9 k+n1b6XqrCJGHxhSFMwtfSZSPatk7ryf50wiHFKIYfj6QfJCqtePMa+ynQ58p6I7 JxvrNuWskPB/qYCmJzjW4Pvbym6md2ugFPAxS2PxP2b0WBxSGC2yxHbtg8AhCTMS GH/UnVzbvF0rpA7n3PB3tMXRRKB1mWhjwuuU9q5J7ESgZTw8/BHWprmzXdRJFfOR EAgRk+wpU14ObxWMR5FAPZfuFENoTO/TjaIqUzYXtYn+4Almkjr78sT2Pr7qmOe6 Wmwn+ns4l7VAVME+TdkqhWfdLLFLju3mbkhkPfcaG5RmDzA+dfcLRz8lv0+HvFc= =bXs7 -----END PGP SIGNATURE-----