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-tracks-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 17:15:37 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 50c1b75fc8db79eb45531b81ad1bbf771b429bae * md5sum f398e967e09582b5087a5daca473c677 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) iQEcBAABAgAGBQJQM8ItAAoJEIXCXpWhbrlNlYEH+wYntW1CGlyL94CVRgZ5aHGz A6B+FolQS7VC2u47TE+apNTez23JDzxH4OdTg3S/54WtGLhhLJz0tg/9bGQhNCSd wu/YLBrjBYWoxyzsl2LJZZ6CGpjhc9zFkgc32JxGmOZXs55/6WQ9Z5jFshE6nzfe s4uWke5Sd5T95u1JJzYAYzFbuReU8wLAN/ZnRD0FUTkvlXFXLpuZhEPCplaXASd+ mcizGn1CuEcqJeqUqLUop4wRpfxC/b45NVI/m7dy9mGhve810g5hBU8KWJFGX/Qc r40CXuin/jYINoKfx+HKi+QzbDWrRXdHwusSc0DWXE9TcIbNu9l0Cy2vjQi2CKs= =64UX -----END PGP SIGNATURE-----