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-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 18:45:09 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d0a13adf74171dbcb07c36e5c811d9b51b400930 * md5sum 8d6c9f0ab910eb6b9a7a9fb749b3f2e7 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) iQEcBAABAgAGBQJSXDuqAAoJEIXCXpWhbrlNBxsH/1KvAreWZB5ia9MmPzKNnU9B c4xfKaBEJ4er6Rql94oG3t0MgSlT4gNVqg0VAi5YHaQV6HnIIo3e3vmJMdh6jVJX CSz6+fwariy69XoKeSobf8zE0jpFOuJQhmkauJz6M58ota1/2jENJTx1NHSoWMsA ooH22SbMFIynSicqYvRkcqDG+F1+9P53w5Bi/n9JRiKzcsOu2sIUTcaJqbnfXy3J YlvuFcZRpQRd1vgryyw0nk91FI3Wh1FCCVdEY0LHbCOUTBEDGQFf04X8danc5IFi /xW6WOWCXr4Bqc46d/kjX4vkq5OKG3w1fm3ao0p/MQvV7HOfPgYe67jIr7Jl3Hg= =OIM6 -----END PGP SIGNATURE-----