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-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 13:07:27 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 797ce803ecd932275898007db6b242008aea84e5 * md5sum 60eb67075b7604a121d249ee546572b3 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) iQEcBAABAgAGBQJRgROFAAoJEIXCXpWhbrlN3SYH/j2ycg49KLye7s4vjXjlx/Pf vJgJd8Xg0YadD+RUxQ7NSgsfUY+/Qv3PJwGNrraUNm91GdAp1CHzYBn+7hVAe38I sqf+aHWdhWa0kgi+dvakSHax/FwuafSd+mclQM2Osi6K9Q+jpEqlT1LefMd3sLvR Leq09gh2i+YSedzcEMSUkI604qdfucHLUiFp5N6uj4eqVigr+FUs59jVpzQ27eN+ GlRuJNxdwuDfLuwrmvFJG97SaUsVgBVfr4Sts7GgizQm75w97MgXNU3Aft+7HGXN ilx330VsKmMaII/zBxyBCgv9OuuEpS3kOlHvnRGO0ohsQ4oVEzy2tDUoe10tBbQ= =XRLW -----END PGP SIGNATURE-----