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-postgresql-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:14:08 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 2a32c9285c5a512fc5ffc80562e8cbe0eba2930c * md5sum e5a070faebad1723a00d749a93988c20 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) iQEcBAABAgAGBQJQM3uFAAoJEIXCXpWhbrlNorgH/03f8l3ZfpUClvP8wEAazm5O JJ7bJyijTng+o02A2X1dgeMmV8R9Ubhf9vuqcdns4r0APNkDHEQoWL5w70EfepRY 5MPp1v9NwL0yNGm6Y+TlDR5Du4n4aF6TJ7GFNnvV1VHgnhfegaViIU2AxMKZCU1p NgH4UhW3P526o65ed5Ru8UJJFXQcP9hgqUMjvFgWuqzcunZS5+hWKtBDbdAAqJmo 0t3/WbotdWCtWGo0mYHwqoB1i3h5SFbdqpdLGRw1R9VDEyhbb1Zqqf0RT7Mx8oRG aYgEXnYFdEv8OQBO4GpDkcW+V6FPhzP4rMtc180RRXjKhkHkSBaI2CUiliY8QCY= =5pmj -----END PGP SIGNATURE-----