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-lamp-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:12:23 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum dad1f2d2ad86c70a050b9a61b9f8fd19dfda9bbd * md5sum 5579a754fc62274e144b1a9310ea1267 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) iQEcBAABAgAGBQJSMsjfAAoJEIXCXpWhbrlNWgoIAMlwYFZ1y0Kqpa2XIViMV7ky XtC6/p9nOG89M6inq/lQKyNY7bCDfqHR69jdXjrz6ggnILJXS6QRYfko1PZDcIRt xRQet5ev+CohacosUMQlIcXDUWPtScMb2QPW+CH/smIIN9c9a71zL5FcurIMHDFJ W6HhjJQZkGZupN5c7ga3tD7H/Dn96tbAYeTEU6a5kzkg1R+Ai/cUCe8t+4qqxQvL Z+DHKTOpYVOxFMA4YFYMUBCpyP0cg6JWWurTiWM3V527cRDdHUSzTw3ljFCpY44q HWi0W2PYMeeVLmtwB6L39YyQACD2MhouGiwR0e3AgmmShtEpcHIYLKYpaMnwFhE= =bMCS -----END PGP SIGNATURE-----