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-statusnet-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 10:10:27 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 518b06c192c77a0755d1b66a17c54519ca61bb26 * md5sum 0f5783097f507abcd8410841155f045c 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) iQEcBAABAgAGBQJSXmYJAAoJEIXCXpWhbrlNFfIH/3NrAm+7UikZNC0P4WPc58XS G9QlkvfC3v4mz93Vdhyz/QojSNSGZyblhgIcV03dFCa1vFGlNS0Kr14Hb0I3YWWD 6k9Zt23RHIlJpdlIzGt45ZwLLe2opGH+szxNuiTTSUKgzqakz6WB+NvOXLu852qv RR0FondnZ1C9DSPDP94dLHnKhi+PW7yC4bhlkzz/RBQGVcpS/9lDYbPtzXiopetZ 5bG3Gezdzn5qzsZ/OtUpXMuteD3SFSlAWM3AIvuxRzzLZ4+w48aC0mQtQAU1Z7+N x14CUSj0YEbVqtlhKg5XkGy5+qNLDYVpbmyfnWa8GBrSBM1nTbO3t5rtiO7A6C4= =tbtY -----END PGP SIGNATURE-----