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-mysql-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:48:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ce465ff1273b726fd1cccb25990c2a3e43c3f00e * md5sum f904941e0180ba589affddebcc541984 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) iQEcBAABAgAGBQJSXWOrAAoJEIXCXpWhbrlN0BsH/j4XO9WLiKFJcDuTtoAKu5Fl HlATDC+fz866FwMfvGqZTGJ9tGaX/Aeh/27pIDPfiWHw87aI8zSgE8ATY32L9llb LrJpQL4DuiHwwN24lL+EfFPhae3/Wy+7uMNYgpshzBS8EmuC0zhJ2QPIK8jnVhy1 Hdo97mVpy8Ovcb4YdBfcrSJ8f15elWaTSWn4REcj8xaExAuoaOJLavaaZg61/ecE pIjcmoX0G5sDv2NdDcGtA78V97wovHmGseE/jM+dRaWF+5XI3eOxPTrdOqTmEvnN 8jczYYq9Z3QsOk8AC/iVi0Dt3LCGK25/8LR5Zute4YSt7Ww+X/PkbwuBU9k/J/o= =ev00 -----END PGP SIGNATURE-----