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-bambooinvoice-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:14:19 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 6e26e7f2a48bd80e4233c05b2251a34e4dd48036 * md5sum c274149376428e13670bb49504de46ea 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) iQEcBAABAgAGBQJQM6XCAAoJEIXCXpWhbrlNCXMH/RKk4CWTvbhFBTV52G0Tf2yn cJeIDg5eq3P58m9oI8j8+1aCCBIlOm+EMxvIp+NjZ3/qydC3NxzAnQj8zsj262CW N1lnkvF0JYUrq600HJY+mkIe3MER+QUiUYfhNLlTX2NPKWqgBFr3vOh2Kb4xL18Z qhcJx1FixezOaxAvuAPQ0ExnWQxzbYezdT7UagH/Sa6FFC1H3d2Vp8DjCgUurMOn RShuWmKHcPB9M+RdACNpes5a3561krPgGMeu+N9LFFkkhwwLYI8jttd/ZS4BdDS0 vyAf8aGgkgjjj3uu3rrw4VtJPzLY5YMP6A7zVx2U+uQDJoWVhXIux8lgo8Ynh/g= =bqJR -----END PGP SIGNATURE-----