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 debian-7-turnkey-codeigniter_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 08:22:01 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3260c7767e55b5397352dc51793628d6e2698a79 * md5sum eeaceb1456d48cb1c22379fd534dcb1a 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) iQEcBAABAgAGBQJSXkyiAAoJEIXCXpWhbrlNqk8IAODukMOMBdyxhCcD1Lad5ErI DwjwXcrtzfTUudZE32kcEHT77J9mTQgBv2ZUXEDirwr/Q+n7jaW1E434RvUfkz9m ODlYPuEx1P5IPcPV0A0obDlniuuDCwC2+ZcLTJZzdmzYCYeQuzNA7pI43RPYQFAl JbqbwWs7W70FYqn1al5Kbk88Kk0fhRcAfOqt90QXtXa3mto7Iomug2F1Ii2U3dNQ 3X1TKOtisCjixWPvTaMkCCOlqH8Ut2YjasBA71+P0+7CbJ+wRhCRmyTmseYGUE4N EB+Mvl14kFN/Fjx2kvk0cKzUrsyBQ+Bxjq1hAUKu08l7lSPe2mO1T07bFi0zHBo= =sKLA -----END PGP SIGNATURE-----