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-gitlab-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:10:36 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 27a8b04612790215d1a4328babdac0d7afef8520 * md5sum c710e02a20d24d4ddaca8a5f1c98618d 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQL8x+AAoJEIXCXpWhbrlNQPkH/RsHRBg48h+2oGpiqcMeOr1R xQOwtOGRolYotGhNOjvDpVtSX899bUcemXQMR8d67a89scVVGfMhOJOIK4IpB6jR 5qWFX0X+j1YuzZAqg9Y1d8vMC6seO1BzQAoloiOSvqP1fPIXWhOnk4WOFnRWW2Y1 270iugzZq5V1l6OZz2ENnZepPVAFkxEyhmT78riQ5hOm4pl2E+aqC4rZgDi6OdDD Z+UCl8JFhLlVd4Io/A88gBVCyh/lt4HnJrM7cKwyr4wCPMbJvj+n0I24DctBuUdG w6let3B1beH1ZNWx0VNC1tYxtquYNbFjDUR9aNbYFjTSarDMhaaPSIb4E2LVvkM= =IITH -----END PGP SIGNATURE-----