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-asp-net-apache-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 12:11:54 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 220aba3e48afe639c0259c6182011159b82351f9 * md5sum 1d243b293976a2a451c72f9782775261 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) iQEcBAABAgAGBQJRgQZ+AAoJEIXCXpWhbrlNJTcH/i0HhAQAhB4r2Lzz1XlYkHNC 7kaRfcJlbMrxclJi45/beJKNU13rzhAmiPIK6/WXljzd3bKf/MIrWdag74XVdI74 317x4/Okl6UtOxXzHZo+6xkY7t1uiw/kytz463FSnpqS39titjhozZFeQvQFtZ/f SZkjN+mLpLslYWEKLgtvAQDMFzCBpYNZmPEad7Ax5keNIya39fl4fLC0zkazNvlW lTDjSVxGQhMqX+PCyABxqdsumBNYwS4bKGPIZtrUvTdbRoGDUyTwVtryyD7hiA+H ZLxa496vyC18FJO3zcwXA2fwyUXZd1HcIGeaQA9T6SiPii2lNqhAOv1f69vfRqQ= =lti7 -----END PGP SIGNATURE-----