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-mambo-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:21:35 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 781162a1e325314f0f73da3f313b8da24e407ae8 * md5sum 50418c472b3de98bb5514df40f0bbe63 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) iQEcBAABAgAGBQJSMssIAAoJEIXCXpWhbrlN6gAH/1KYdKqoqDKZUYdtuJTuLe5k suZEwIJO3YdRKRpBgIkqn0d80JVYEXa2YDO4ppye+34tzChlRIZeWazy0Bg6wDXm SxJ7BKsupXeY1xkt01h+FLp3AlbtBVBE2E+J4sHaR1ARP9m0SfpDom9fIzUYT8c5 hkm1WuW6bFCUMIoB7vFZAcnnnrDPjRrqGndbaS4KUWcBvNXrnEiSGdkdu8n36bHM 7fOBLDRGulPkxdpTp0Vt1/p3JqZc8nnPpn5HEgxgr6Wa9FgpxqjYQVoijdNHT0DV scnBofB4Pst/cEz0etspr0798aO2UqwXR2k9dFpy8nEPDdf78xSnaaUGl4UWYgE= =SACj -----END PGP SIGNATURE-----