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-simpleinvoices-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 10:04:04 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3e324b708fa57666fed708d4693fe99cf89d64ba * md5sum aaed93ed3c34cd2b3d7c4c8c1832d7a8 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) iQEcBAABAgAGBQJSXmSKAAoJEIXCXpWhbrlNo04H/2HoHcLf6S8UVWHUimg5y2/z 3g0tr2qkVnuHIkdxsfW80NQ4Yu0ZjTqCKM+tT/eO+pkz9WWDQdBp9yhrWQH3c3mq hTB0tgt4cbFHi0rLDUMpEhzXgoHMVkXAuFmm0Xe57CFFepodlyqegxZKE/yqcVd+ oFnYvXE6bAiaZoP/t5t6eg3rkmNbbqL/53iQkS2z341KQempZL2EhxNaHLw9Op30 L+jWhq8w3hSXMM4FfrWkbI0ZRp342ydthtHeZVDvhblmuY82uXkdQ2gXd5cta1B0 JMrkvDUUwWWVRAWJ0T0sg7Qt2qQ2xx1z4r0s7WkcZZ03UAz2EM2Q12NatbRD11w= =0Cit -----END PGP SIGNATURE-----