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-postgresql-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:19:03 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2fa291b5fb571a28a7537c3224838d9535260e1b * md5sum 9a4b771e8a90ddbe8443aa033109a0c2 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) iQEcBAABAgAGBQJSXWrvAAoJEIXCXpWhbrlNXDkIAMKvQU8SvwB9YJ09Fn3FQ8eT cNZDfcyo5AEfMukj0jMQeSflMhQWIFov0UbBiyMSkK1rQDWmfZtBOlupumeClJyp 8aYqN3/fvvWNKf7OAjzBoFoIDY7MPwhvccGQ3XmBul7/opf8ECGPT+/ZQieyBff4 juGWkxMb0IX4ya+xxxNBXNJg0qO33J8PWg7h3hnvX+y77vzhtyDMGp9GMpyasj18 sZD+ZJzizLcSAsTIw7wOzzDaYrwgBDRLAVEvETmi2v1SpHCer8tWwAZfvDMEbPfF KgKXdsiJjJbkG3rdNAn7MXOOpmldVtp9048bdrGhlqfkuNf2AtqITps3j8vOTgw= =Axya -----END PGP SIGNATURE-----