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-wordpress-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:48:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 302a31ec36c8bc63604399aee003df71d40a1f1d * md5sum fb801d54032a6fc6bf89850ad19218f6 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) iQEcBAABAgAGBQJSMt9wAAoJEIXCXpWhbrlNqg0IAKCidatf9tg/q2I2bvVtzRVU NDPL9+AfpzrnRbnOoaWYQh0HoqPcbRpEDyf/ZodQs6xzDSnAUvWUoy+JQBs5fCAn 3bdSK8oJ+h5EBNPeEfuBGKoUfC6AIR4sOOeT47c7VZ92ktiYuiOLiQau+YuSryX8 U7Aq1llEWrpcli4qmtsJc5iybcRZzlEQTXdFrWj2/WzgJCeQZdX93VF0EV2BbfcH A0An6pSNGnd1gtzhLG9S+MPYbB1z4/GC2A6g1/COxyEh6Ls1yUnSm9K0xPAC/bFM KT0KDqAvuDuihTpiBaDNTy9108PBEmrGNe/tGJXV2OTaaxrQlS26++JSmCODQSk= =2xFz -----END PGP SIGNATURE-----