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-moodle-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:34:43 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7267b613952b00bbd6dceb19fcadf192b3147f7e * md5sum ee9cad7bf12aedcb7c53589611cfe529 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) iQEcBAABAgAGBQJSMs4aAAoJEIXCXpWhbrlNOloH/R/4lRRqgusav1roauAV7E6E eNRWtvIAjb1ubyZTAkWOU28IenTu41rwFVx5+eim6MW0+TU/iz7WM7U8gYA0+uS9 ZZ5gVjug1UPGA+8qPLTbSURhWQoLc94EE1aUnmfXw1YfuvUM8J2B76rf9Kxn8qfD 6l0W27v59aCZ+ROzgCUrI+9L8D3bkNf0XdS5BnD3/PZtqZhgssqaTYa6oRUMiOh9 eX/0IdUTeLYUloIJshygh/6cK7Fau5BNGs1OUlBLDWyRHKgewNqCAL4lQBUrZRTY WWVTrm0o3S7vXrbsRxNZjvdu0EEsgzAVIcXYl2wjb/zuIYruAUFhHfk40FP0yjc= =SfMo -----END PGP SIGNATURE-----