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-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:49:41 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e3f9c26951301183d0c7f8a8c9e344c2e2106a37 * md5sum 2f2f198cda73854394e2a0fca8af9817 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) iQEcBAABAgAGBQJSMt+tAAoJEIXCXpWhbrlNEr0IANTtBzQQVKybPJCFwGT9mSLV VrXwC75qFQ9WvYwzb5sW2BPzgqkte0mTnTe6RaRTCOPULjPDp7L4LUgxpg1GzFRm i6vteCA2secnobEFoFX6tIsxJ1h37QoBnVilSlbuuwdTr+TRekYzuUxyhih3wMFV ZQk7e2p9NryHua054vFtxkJml+6hX404rifPGcAuhEth1SmtgTszYjmTbdMIgW7Z VgSObdUcu3NoHgDCayjJpcFX/GprLC7JmYM6zmnqHzS/lSaxo9sMf0fmlE0M/vyc gsW3XfdKheJuWc1jCR6oh2kcfIgEA5o30OZbimSAGwpDFWHHBYgEoxHV8aiNfuU= =I0Wy -----END PGP SIGNATURE-----