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-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:48:53 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 65d82bf187033e78848d583f5b36fded84f11e4f * md5sum d5a751c853635bac5e9f21414eb02cfd 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) iQEcBAABAgAGBQJSXWPeAAoJEIXCXpWhbrlNHG8H/ApCyYZflPUClRVB9Kz2DjXd S1f0/JV3ICKflDxsg3fKuIt91qFGoRllzmcudNOhjPhceQuZM6ekbTmb7hRGo4J4 uxNXYTbHWf3XQa2xs7o3ZOGUe6O1HCQnOeHXhIfmxfrk9En1OdKnjX+ZyC9FpwlM nwvEEO9JX898Fgg0MZhoRMNd1ZXz1shz71FQboQAR2WmTxjd6QiCUMwauQFoCeHg qGnV4aLFHIqdZBNEXlYo3dBim6k0j1d8UAGUXUieMvrUGvrS3GktsPtYdVTVdgSs gztTGAkzMy7ssSslGDoWcBv035hqRIF2Ntn32DnE1yxZLIvCG72fhjJpuHbl0Uk= =nSN9 -----END PGP SIGNATURE-----