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-moodle-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 09:16:19 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1890eea24e53f1de09f092fd1b6156d84875fecc * md5sum de3d61227474b2523e698d6a0f241e6f 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) iQEcBAABAgAGBQJSXllZAAoJEIXCXpWhbrlNUNQIAI0jsVKYWSnGBVo1R+tIt4GT hsvdTJhT2tWVTdswe1p1Nvru1wmftoIlBtiNgPcdFdE8zn/AtIPNyeUuzCJC5Gof cwPw81HCiR6m2XJgIQ13m7JYxzDQ+NQfx0PHkbz8WnQkpfPFXb+WXahWb7jaqU45 8k2SoBKntfkNTF6hXyhi9I/B8tef9V3nCnlzSsENVnZyIFEYfYPJZglnPMW0G1/h aeCWHxxqkoposbKQpJ/j2S+qE5rMO8bhRVs4vrb94t8JuN2OkfrOmGsUIr6+jCF6 NvpWcd6DgMeppnwIPDq5Ux5rOJzQf9d7bnYrfKop8JT++SV02q850ZtBPPSPVEc= =CXJk -----END PGP SIGNATURE-----