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 debian-7-turnkey-tomcat_13.0-1_amd64.tar.gz.sig gpg: Signature made Wed Oct 16 10:33:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 34fb2ac302a12814b55c527afb4f729da6a713e6 * md5sum 962b7e2d255ce84b07a7b1de54796aa7 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) iQEcBAABAgAGBQJSXmt4AAoJEIXCXpWhbrlNzJEH/3ZrlV3WGFIG0C9M6sLZsJKI lcB9LWW87oInxTHW2fB2u0ujzh7OfwQ0hxKZEtWgQ7vGHS/P+tWTbqYfN4YT21ka M7W0g+XaCcdSBeN4YS3A96mOE8Fyd1Rii58NjOYt+NjiCD4GMAuXWAmGRhQkJL/t on1ghSO+IMtG1uz72DD6t3Aiax1tPImof5aOZ0k8bCtNeStEWPVlKut8C3YEWpx1 zREK2vb4PcYsHqz8LXkr400TubcnIcR92nShI+5NxcUNMjqf4xkKOsjdtcVGwS2x Dkez+wZxVGm9cv/6NaGELw3lcTfqyzuC5TECiMaU6YlwIrmpmbstfXoTIpvT9HU= =1L0H -----END PGP SIGNATURE-----