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-b2evolution-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 12:38:56 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d866fbbaf00e1d061425ad808d660f94d550b34a * md5sum aa01c2ba5ca05d13b0504521c3b58bf9 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) iQEcBAABAgAGBQJRrd/XAAoJEIXCXpWhbrlNiQ4IAM2lBJL0mYy3sHjKeipLIXfl On3plMlkdl3D18sGATW0NLyzyDZu9i+S59vLkLpvY22UxnTsMuwrPWTY9nAdQ2C3 Zitf4W+Wy5967YxP43EsqRGEnHyxh2PPwtAy8hMcrqGRGX7mUNO6NK2I+O7QTTru WpX9cJupPmOUigRdpDBia3oyrTgDNYQ7LGBiQOB66S9AhdRpYe2ab4CLfndR1GnU NC7SXKpWUC2z3IQ+LGklJOyOOvbS722nXMso1+V2/MyJElUFxv7+UmunjvDcUemD dV1+1Uu+bYaG0tTqM9nmF0mM+sgappMXEy1zZsm9QkqpvklvnReDTRPAdfxJjgU= =D8q6 -----END PGP SIGNATURE-----