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-tracks-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Wed Jun 5 00:50:08 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 78ff171bb475aac6017fca89fa05686ae964ea46 * md5sum 84bddb71c73dc0f8e8d20ffc84001d2f 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRroswAAoJEIXCXpWhbrlNusIIAOmtIw8r0IE3zJ5/3apxzIIE tpvuvDSSzLC+dsTZ8MgkEkuVuU1/KGfALPF1D94YCnYxZQwAZK6JPEGSu0yko29/ PQCzmm2Z78ts3a55PUZrHKPWVzAwghDJDbGTKL+OQrxLsdqs8ue/TA8rL7rdQud/ Mc14gRNKCIkFyJsB4kBf06twkHl18IeGoTjVqI+aUH2tPrfyPYSJvhTo6BPpldLw HEOeDDVn1ImOttOEzca2MXNopCmnU+5WFeQfo78dSTDpXIfmT9sh/3GOGyByN8HR E54NaffXETO5ekXCas1m+tiPhFHOVAtAaoO58yYvNjMQiGO+k/VzCJvTVTrAIcU= =9Ip8 -----END PGP SIGNATURE-----