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-trac-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 17:24:48 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum b7c2fd2bcbad961633802a72c9bbad040411f50c * md5sum 8021715959882ecdbc1abc10ce9411e1 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) iQEcBAABAgAGBQJQM8RYAAoJEIXCXpWhbrlNi30IAI7Y5OR9Rz5mCwvTlrzNRgG6 js9NszBhctCvnFKVHiXfKCWMc9FIL+znfDp9pDM5oJc72xOSSjC8o+RuvooouXY4 F+HRRlZkyMSOqJplxuBd/pCL96ex7bCbWVN4j/UvrlCSblEeC73dDzwr7x2XnJ2N gj2k8Lt+aa1LX0c5fEVMc15GTSn07neVien0zHS67IdcP80wBvhzIx1IzPwLnc/w kHOSOSnChGwO8L0f7qhqyKLYQwzTayZSGuR5LNdd4iwZoA2q/y8DEvqihO96CAAl E0ZkdyvmVenDYX5TOCsqmDD9xO5d2wHSlQ8rk738rwVAx3FAmXeXqGRrz58AEdA= =BMhB -----END PGP SIGNATURE-----