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-openldap-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 13:21:02 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 62d6d0904aa978131d46539f6ab61bde81ae22bd * md5sum 40a281b3dbd22e42ed530352d8136b49 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) iQEcBAABAgAGBQJRb/M0AAoJEIXCXpWhbrlNy+EH/1XhtfIsATAslT6em7+OVAKu hEZ9kjvVda/9vG16Ry2Rom82AC+1edK4H/0uNKW/2rY5hP7UEIUmQDzqGi6wjC5e hwZCbojkQydEkCP6ERwR5egFvVMG2BFrQEvVQ+Qac8wkgNgep+QAA/uLDxDmpq8C qZLzu1TTTbv+bT1xAvAt4q5BhULir8Ias6Q/V8qI4DSuZ4laEY4gla1gGFVMOQYy sNTTUNN0EwPRtMRABGGAM31fJdVjB6uJMpd+4+tygp7+Yx3BSDQRZvUN2M+HX6jZ tW5sd0feQLJWwlz/3TcspCQVx/80FJ7g+w0jfNL3qRiaLHfcr3KX5fewRgkhKGQ= =PHZB -----END PGP SIGNATURE-----