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-zurmo-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 19:49:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 609eedd3d4767a59737dfabe954810a03643f4d5 * md5sum 146cbe9cf946aac2a6f0d1d0ac9a9035 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) iQEcBAABAgAGBQJSXErPAAoJEIXCXpWhbrlNW60H/11M216MDD+fZXENph9C9/Eg chkOVWRZCzXvz+FLJOhuLRQCPdBuKerbBvsLXN5vrrRPP3Kcyer1aPXI8wsgHpTy j4GA8LRrYfhq8vpa1FQ/kJOSH270QKytNnTjAmVKx79kjr/0ftbCmnth9yLtjTMm Z3VJYifKTOIiBpRTkxfDCrX+x4Vj11zuKtgkrMGNAvzcwuNfmnJoiQDj/eTc7DBX GvEBmE40kQCCkZQ/KsgZ3FL417NyiGEU6+lEwE0yWEJyY99wlGzc5nN06Gbq3VeD L71EcpCnycjEd4ukfKgHR3Spkme091NNeigXOu4uy+196UlVWvvEtjvk8zb2qo0= =IWrB -----END PGP SIGNATURE-----