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-yiiframework-13.0-wheezy-i386-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 10:00:22 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 33762f174ee708158d0df7f4e9933e04deebb533 * md5sum 992859bd0890575ba0a927609e1a827a 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) iQEcBAABAgAGBQJSc3utAAoJEIXCXpWhbrlN2ZsH/3mD+zkuBgIiwvwnvRTa4GbX SltfXQmkiJVOGjWV2kgAr7K03Hz7M+mtNdaCZ8z7+KBAempsQZnuwkfbqBH3t4Xw t98FcFLIPIndMNdeHThPrxpJBKB0HxaZecVSzeL/zi5sr0jJXA7t1OoqS9F6zo9M cmnWRJB3QKGG/KfjT4DQ6G6rFFXJCwj+QrEoNnAfxgz8Kq9+POPsa5NEIEuKLH/o 3sH4OsL47o8tN/a1RWcAvtJp965VCHhBhd7EKI5Gx36iitiIK5exgjhfwJShMU65 MbdJWy148xRfZP+izcX8wbyBC5n2+IiHi5z9lgHFs0gBMyhYgjmKuHkeiubATN8= =QN2Q -----END PGP SIGNATURE-----