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-punbb-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 15:28:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d78921b483d1fb5759a32ea3065cd527e953a2bd * md5sum adc481396eac53c1472ceb50b44b4ed1 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) iQEcBAABAgAGBQJRrgeCAAoJEIXCXpWhbrlNVosH/2z+9/rQj+kuduIiHULEUsKn ruOOx5eFvze9jtNhE/1jhqE9PknfyIstdZwntOL3bws8GmAAh5FV//K1ZYyFJLHM 2LOqNvZpDkFqXebWPk0XNJw/SzCj0GmOIC9MNxWpioe++exL2PZ0ZWRmBp2vQKB3 j3NlrROid97Af0RC00xJyTs0G7jhtKkomHqPtY3t9612riDGecFQrVdykWhh4ON4 GaPT0o20YOsR70cAAJ8JAV5kdDhEhLEg/riE3DHYb6q/zD3WWSs9pJxEudhjAYVN bXAWm5FdT5lv6F34cXHh2SGAyLJ5ttB2jEbnVxlw9Tp+Eu6JIe1Q1xXnyjHRfDo= =PJaV -----END PGP SIGNATURE-----