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-etherpad-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 07:56:40 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 949e1d00a08fe4429ea48bb278b28c3aa2f56085 * md5sum e337f5471cbfc05b552a2aaadc8606e8 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) iQEcBAABAgAGBQJSAf2uAAoJEIXCXpWhbrlNS8YIAJF7irAzovMaDAXKF5+ee7W1 rYrppUjwWx6x8LeSEjMHlU8XXAbE53IFv8CuZV3KaS1zEdcRGkJVJMROEIUMurby IZG/eJiOhB7XT5T7MQFAyJd0K525rq7ESOdJS0Ng/zfuWSPbhm8LtdAan/P8le19 xzy/D0cTN6TQIl55Xwezg8YVOdnSGpPSRwVQHuc5l7ldXqlebI6fQ9HpWMWVWcQh FecmrcCrIDvDoLGvQh0Qlc+xxJRT878/+8KhdOc/FCsvvmDIC1TWf0vDn6CiWzQw /2JTK3hjof4pUzttR0bEs1oz3TXYNMEXUgCtGRY31ZK7N+oDojvfVfpZxaupkDs= =sPl7 -----END PGP SIGNATURE-----