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-bambooinvoice-13.0-wheezy-amd64-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 08:46:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f3938acedc6ccdff3fffe966e2982f3a4b5f3a69 * md5sum c6c1b7c7bf34f235e07536eb3f6648cb 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) iQEcBAABAgAGBQJSc2pJAAoJEIXCXpWhbrlN7ucH/0zDpySnLALR5PQzRBzVsGhX 8gy56wk7xGQSW9qef+Xhta/YRdPMyIp5ounYTCh8e7nzszM1gIocdLHrvwZEe7Zm Hc9jef9BzkesZ5qUzertmf8x+0b25hFpO19ealt1MGNCFxU3twXOFHFGH+IsLvNq /Ir2uUUcN50edl+6PM0DGuGWifGggE7tuzYaHCwFFqq+TAxGxnv/SH4sd4It/VDC nCHk/2oUhR3dhxdCjddMuSF8UF2TieAeOq5IBfHYXb+b453k1mRDjonFU5rhQsy4 oZt0HXZxnibs6EwLCDprAdVJisjZWLhkP23Rfep5W/KKbWIxhLJRAswTwzUuEJ8= =lDFS -----END PGP SIGNATURE-----