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-punbb_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:02:09 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3fca6e5dc9d100dafcf2a91c3b83ee5e3bf808af * md5sum 1aa48da3fde5d3fc53b274da661ea241 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) iQEcBAABAgAGBQJSXmQaAAoJEIXCXpWhbrlN/K4H/iLsNJ5CebWg3x0NHKsla8JP a1nnVmBovqWsbMd2+VN5VQOGh7Zn098y9vdTYi4+3duipmb5ehue0O5dIsvoyUF1 HvbpXT/yvH56SMcH15dvLDGJgngfkLbM5XwldS3TaI+Pw+ITk6P3GUvIB88MGKLJ L3hO0DM6pK6CPRKeODdzTcG9UtG+q9JnQNTX/1GL+lfIjU6F9mbiZBpLF0bJHALh 60ROLFu3R+/lqdvdHqu8yVF1nKwu6uaefkvPnyn622XoiAbju1Qjrp570Hh2T9WH LIKx8w9fCQYnZVt3tc2E2yrB+zB7PzGejhhLwCjY0TsE82WPzJYpMex8zVBCHF4= =a0VG -----END PGP SIGNATURE-----