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-e107-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 15:51:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 314a7e51e2267b1e00842f6dc1b10a05269d078e * md5sum 0ac8be0aec9fdc4bb82e86cdf517dec9 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) iQEcBAABAgAGBQJSXWSJAAoJEIXCXpWhbrlNgzAIAMeso4qeiTjG6YvZN/DQT4Ss 99sT+1fFospDmv/f0M1kb8qpu4eCBoA/AuQbgZFXJ29nCP/uCgl2LPnLtRt6bYO5 Mq9TyjReIICq2X9g6folSnopubTSxC1SR3iExoqVxDV24cOxgL9R6zjQWIDxW2Pa zxQuty+OEmogU4ZoFGiBffTsyNFhnlLJilDdg++B9tFofrpoZPbsH+HgEb5IsAAN C3rtqnq/KN6fgObun0xWeDAoWgya8vBFqwGs3CFd5UJX2Sik4zmoKNqpLDsAibma 0O+tEMgjgYiv7t4Zg4nHPu0vEwbKqHR2iZ6G38zY+EKc6Xc961d7aSdDAfFoy3U= =kXWv -----END PGP SIGNATURE-----