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-otrs-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:08:11 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 69d758827995ac91ad8bd206e6b2102385b451d8 * md5sum e1a93c1cb4705a6d5f6b6e9d921492a3 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) iQEcBAABAgAGBQJQM3ofAAoJEIXCXpWhbrlNbpYH/RT+MOXvA13lUbB6x4c6rPEH axWaCZC5JZb2CZt5TB/vp0YDPml6zESU92TBxGMiRVqufLoi4JOgtn8tcYXOB6Yp eOLvFmQaD0ouuF60Qd17NFCz4aVL9NC1QA8C97nO7Mw0D+uXt/qAMCbJ9NlfSWlh numrWRJDGuwuzJiL0EM7Ly91Wzz9nev+sfylqNhXjIGIEz8VOI4KG4UXZ7knlj31 iNCYkYfdM09Q26YZBGOysGPGhThtFe6yeh8+92yJrp6DzKuNNTfabt0LvDl0sGfp 7ALWtq5W93Jn+b5LzbvR1fK/5iEpIi+jjLl75dmGVnFXkPvRlJCmDWRXxLHEB+4= =WLg5 -----END PGP SIGNATURE-----