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-nodejs-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 17:10:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 53db8af698c85da5fc8355552f308df7cd17d9ed * md5sum 57737ccd62181db4e1058284784c4c3b 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) iQEcBAABAgAGBQJSXXcaAAoJEIXCXpWhbrlNZhAIAMrSFx+gT6el3PYxXhr94Am2 Fn5WSvu6sFydZnYLXf2CNEFHNOmOkVNYZaq3waMG7rVFvSjpp+6GA3om48gt190l SDZafNwENi3pmEF3afH6L26KIg89Ur9MUdZUFZoH0we9y1+En5Nuy+zDmBQXWX9a VTgz/ZKSm1Br3rsu0xlzFqGLA/E2S8R17261J5MJqdhDLOYPMeFW36DG9Nsv2kQ/ 0aSRoWAkv3W5chZFl4GI84QLIyMvw1ip3FN8hyimHZjlJd2l91X/LaUzOv9ni8Bc zEeNJLHebAErLdRnc/RNfPbwfX/iV1UbWdf8i81vCTvVA2qG4h1bgxu7wN3MNSY= =AQtU -----END PGP SIGNATURE-----