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-processmaker-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Tue Jun 4 23:23:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 855d9abb074c319b427ca5b0bc4009a0405049b0 * md5sum 1c0bd7e6f2bced766343f35707f4ff94 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) iQEcBAABAgAGBQJRrnbJAAoJEIXCXpWhbrlNJtsH/iypVdXLTjyHO75SIqFIUKje XZCwm3ozW3QIDEoRa3RLPRx7SE/OnFBpujRS92UIgJUJQyZSLnG8ylp7bKFg4fAG Ttwqz4pRrlI8xtQb3GKZjsk7Fr5hfTXgi+Xm19MSoURUpqM7OS3/5MHXNjMpTAFI b7RzjitMkHFpg7wiZliQ6uFj9BGIu4Z5au+dOlpyPoNbhuSwOEPrPflMtKJBnzDn 0o56UDLNaMzxa36i4uuhrtRXdsnLaHWWZhlmtyoB1wHp4HnqffLPnrekE0UU33hU /UMR8fwJWlaqTEo1ZqTFOEerMfLH0dCL0JTkERVFKnxJboDnVi+Xr96ZangWTNY= =u8CZ -----END PGP SIGNATURE-----