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-tomcat-apache-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Wed Jun 5 00:32:31 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum bb8c91187aa23880c12aca1b0c912ce352e46c20 * md5sum 9bd2089147218a978d43ad96773f840b 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) iQEcBAABAgAGBQJRrocPAAoJEIXCXpWhbrlNdRQH/3RhJIsxenDdReZOjd+3nrGh hC8lW4tRAJPs+fgYC39kJ0mfihE2JHlsxXIszSqXuuk1qlWdxdBzqiESE4bSIcCZ 3fkkqNpj8LZzUqbFzB57i/cSe+Ft0rUkw/RAs1HqbYTXJ7y9aPNdRnTjwHPQjIHr wRAoyhTzXU7SgPafpYtmF907lz+Fqt0kTlQfp4M4Ruzb4nEAv0XTcr7rSf8lq6Gq MIprIQ7qsOJRoWnCx8zbTvFEC1+NyDJ56nB0vEZ1Ktr60awaeOzxkH9pjJsZzzre FWoeiKnePyqXy5x1jiMnMXTQY6QF97g7brGP8rMZeYw8Rcd8zlNM6qvC+P750Ro= =lZI9 -----END PGP SIGNATURE-----