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-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 17:02:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ad81749467bad1dfc9e0f88c67fd03aa6a25dbf8 * md5sum 65f28da9ca9860ba8fd2be6b9324e19e 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) iQEcBAABAgAGBQJSXXUqAAoJEIXCXpWhbrlNSAEH+wfRhRlHLShDnh6Kukv1LwNS d8k1CoAeRVASMcDg/S3wZV6yrbhiCrnm0x4oTLL/lyMu68CAUx+mTZYtzdx+u/rq ZygY0e4feIAuc4ubm889iFgtRUqBZc1gnBkc6IFwN1thNt24m8zUiQXIcHZ1lzFa tKuaPqoHmQIB+BumCk3MR1Jq9NIDRdCjrKu6jwUBdka5QROdPtt7Vb/FbN4XmbNP qsdGdDkypxh72jiDReVj9z+b7lS6ufmjdzf4Q801CqtLL8ZWs+D6tZTKguZ2BiJu HxyM70ey6579XEhV3BMqY1lY6zbjLRvemIUWE+UBVI8G/P6kOP2nc1eOSeUwt3o= =LrUw -----END PGP SIGNATURE-----