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-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:36:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 27607a0b34fca9fbf74c4c00eb93e0c6c2e5d133 * md5sum fc31600eb181b2d1a8a072b9aa7cdd38 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) iQEcBAABAgAGBQJSMs6WAAoJEIXCXpWhbrlNF50IAKrVXHQuf9XbOAAOqtJpT+z4 Ja1rPMDMhwoXThIULOrzwC3+/dqEJ69SpOuq50oD0E+LdhJv7OBVrnfOQk832ezK co0EwzlJle9G1j3YNXX7IL4VEQF1AuRxVwnfRU+PCY+8J/340brsnxgkOjKLnAio cjVSuSZKSEKzxt1sImGd4UecmdYRnDA2yTPR4/8uR8yUTZ4UNuNRWw6O3sEPU4v6 pq/+KV+gsJG8h1dCYoB7fOWJWTMjkxBOhvnL0dNVC7vnsmXfrEyYWWW+JLa6Ljh3 /9+rd2d8dH5R2srN9if+2D5tvTJibTKZ6LDmc/jBIwmvkC5y+nt4YiDr3+D2vz0= =s7Gq -----END PGP SIGNATURE-----