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-zencart-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 09:26:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a6ced5b6852666d0d5035aba477d7db7d84003d8 * md5sum 09f722776120afcbd1fdafa3e06f106a 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) iQEcBAABAgAGBQJSAhLMAAoJEIXCXpWhbrlNOLQH/imvIg0pJ34lYNsSXRgQP3KG uKZ6DwLORX1nzN6QXaYXwUYmPF9AFdlgzhb9Ss2Yimu/awnrdmAWG9HDHr/Blx3Z PnOSx9jhhOqNoXuMii6qSrnN0VjUmLtXTLtmQmGSFmki1bqdMozSYdxTvgPCTKSg 9SUXU2Fm62cSVj6l1wV+SPA3Dx8M6t00FfJs2O91c3SZQpncQbXeyzBF4SpRIkkO OEmEbKtnFMOfIWQM0vC/0SD/36AHwALL6jM/L2/svluZlDUUylmapr1PoCOMeTK+ KOQTcrQBbjxeeU6P2bb6kkmAoOUM3SE7moVPdVa9C9cBS8R2MpMyOI5mskMrBf0= =v39X -----END PGP SIGNATURE-----