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-b2evolution-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 15:04:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum bccb130f4e5029cec3a919495d23307f37280b76 * md5sum 041cd9c7d1fafed5877a6744916e0f38 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) iQEcBAABAgAGBQJSXVlcAAoJEIXCXpWhbrlNiPcIAOGCfoJAGsUIEtdXX/RZW5ZO gWVzfvQ3Srs/NEiTl0REO1y+lJaqNW1zukaAq+YpvpUayuRS9Tpab1C4ToFi4UHo JBNBZddDrnDIajsWgnTX96us2r8v+TT4g9o3hJf1R4fI2LWXGYS3cCd1NFpxT1t2 H7jkza2P1ZTY2GdUjKMRKVA79IMLGx8panmM/eZriz7nrzlbRIFcmIqasPTe4x8z dpCEU77li9rdI5lxbK4w/mO9VDvXO0dNJEZIx80NJRmOfdiU++3K3KLLjgh51S9F NhjsmxCb8+PBDFweZBRfSr547YZY4k+3iD1Fr1TpXqcXthzH9UhAbHSCH0Tf4y8= =HO6b -----END PGP SIGNATURE-----