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-tkldev_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:20:17 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 984f1df55704097d88c90a4bbec328e62d52cd1a * md5sum 084f771559b34e455a59ab72fada4718 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) iQEcBAABAgAGBQJSXmhcAAoJEIXCXpWhbrlNir0H/A1qzydo+iK5w3UwU0kvLo+Y HYrihKQSS1rdxQehC0WLNN7wUlXCWG0GMjl4LVbKDwfpZce77dpy1NviErmu62iw VpnmfyxM6GIGnoUzMKL8k2ibDeBCLXOnKcTwTtaEXxEci+xoi5FhdGWzmsEb1sZe iqtFxbfmgTcHn2AHUGD3s7tZeUnASmFg6RyR0BHRcRSlriaReYKPQXZdPSRcILOA JrDulTlLYoQQP0hGg7b4jo8HIBCOLAD1ebGq+VmsnH22TJcdYZiotoc7KgDM2rCb zFvHRJcmQO0+WVH1mnIw/H9EmwOGqQsdD1TWJ3c0FUi2JdiuiQOXf5xOyGbRyao= =nfpf -----END PGP SIGNATURE-----