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-otrs_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 17:38:48 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c1259f2825ef3245eb7c7aee0b1b5dc2cc565705 * md5sum c740e587e6fae2e50bb7b6134b2dec6d 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) iQEcBAABAgAGBQJSXX2fAAoJEIXCXpWhbrlNQ74H/2WQezRYU4jNDvWv/j6VQl7N LZU12AFhwlqMLCuTYZzKFI/TCOkUmhLS/B/HEpPXQzf4NMu76PpxLj9rZ7rlLoZo lmMySyJD63a0w2qO9FxwT9W8wOHGdi46cXqexz+X92zIiPx7MhSipmSUK6AXtBes PJ19mzyL+vpzaDKuTvKRrJ4Z1Mav5WjA9JK10+IFets9v2sy9HyCh1MaK2BoEYn6 x2/fh2dCO3UYoZAhZlJJemwhbnVJv8MHSc2qcg8opvzLrTv/G2JUEji2IT/t7Oe3 HVyS31XO6IoRJY/PtPrCTqTnAbd7HZSAo/b7ak8CcaowFj/HWyDoNe0xNyxHVRQ= =oWq+ -----END PGP SIGNATURE-----