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-osqa-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 13:19:27 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 009ed59689998a538823db46864bee254828e5b9 * md5sum 6beed0860c9d29cfd5cbf519e5b93e3c 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) iQEcBAABAgAGBQJRgRZXAAoJEIXCXpWhbrlNCQAH/iYe4ZDzHJRhRc803GHzGgxA VYjKoGAgyMnf1wviFJiHz5z/4LtCVx9mBDIlDqtNvLujrq/9mzt3vg0TmnfnWxwo TCz4nCcrwi72ZLznIxVDs8rfR+vNNCqwmohqE+ujeniUtTOFe0V51YD4L0OAAG5j dK8WxaSh9AAQTsrBy4IcjSrUNm0Dd/gCmAzj9DgkIEGqjuBiQ/i1spbjrIEg2l23 Ulh7+5F48WucIw8ko5lyJAPD1pfNvimGxFaBI82Bdfbal1XJvPc223WwO6ZRaOzG p2oNuxWy3GyfV1pAK2CQX9YJls0QGoXOA9tgTf2t5V9eSW8D8FMRid+yUWi8b/M= =4Muv -----END PGP SIGNATURE-----