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-tomcat-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:34:30 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 0d17ffe043f549457650dbffbea61fdc591703a7 * md5sum 6c58bccdedb12a032b7af3fbb8a05886 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) iQEcBAABAgAGBQJQM4BJAAoJEIXCXpWhbrlNUyAIAMvStArc1Y+KrxGaaS69KTW0 7KZVqact2XhFcy8t3MP6qxRmsCYFsE8GKd7HJR4ga88MA0HaF8mLdSTC/5xHHo0F DoBpHvxPbf2bpbzKypg5/lTtZf16QD9n+OaVVYCS6A0+QyPHNoxG+9jiqaULlnn3 xlCybrRd2lLn9qLGW6iyZVed3BsUPMBeRHQ7KJOk2yfAArDuwVPzNMkH2FzW+TJl Osz+s7XuWZiLVJ0wtCEP4QY9CRSfUEiqy++NNVHvJ6/FeR6xVNguM3LFOhta/Nsk 3QTxD0IshvEOMJtHTtd65tZdjvikGx2E763uPmNAaOPhb4P8IT4NLzLCb3D6lxY= =vo7r -----END PGP SIGNATURE-----