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-phplist-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 15:00:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b05b05d3e970f84f51731ce112eb6305f3fdf04d * md5sum 9e2760820b3f75557941da2b976453d9 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) iQEcBAABAgAGBQJRrgEOAAoJEIXCXpWhbrlNgUoH+wSl5C8giF6JUiT8DRHyvslv 11al7oIP9GpVQV+9EDRSA8NQlIG5Er9BwqueYhTp/ZDuGRP7yRRJAB40wKNjKDnr 6Z049+fq/rFB6IFIJmYps7u7xC8dZarOEpIsuQPfQD11XVJKFYh3TlQoNx45zhiy wNcW+dO7teDvKrClu6l63sZnGyNG16zUDKzoz13oz2+xKm+FzoNsMEry6NebO7+d P47Pa8F5hgKVAuD4fND7fQQoU97xzTfAtzbwflVTPyF8oORcJx1otQLHapUoTzZ3 f1totUy189eJLhR9j9p0OWfYurGOVAhi+IeOjD5glDZUdR/s4vfyxvkjR3joyMk= =c0MG -----END PGP SIGNATURE-----