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-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 16:23:03 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7acacc7554bca811aee01aeea99de1203091f29a * md5sum 81855184da1b7b91871190e4968a72b8 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) iQEcBAABAgAGBQJRrhReAAoJEIXCXpWhbrlN2YIH/17tOPJTAnKVGUo34OKI8519 dkiq+CtgXTygkCUkDRzdtS4NGoN9h+/hADzXJEwSySW9uZXUmXKbGlKpzxe3i4N2 aDjvMpK8Ba1DVJj3mOuc9YJf0Hqry6ZEtfvCyVkeR9yui9bwuZvtussyLgt26azX uS/DG5nJIeCFMzo3IIrWxKRjs6wj/xQFl8UhjlKxzDwOffC9xuSqzdYMyRaCF1bV C/ppAgMAAlx+E89mUhKyLUwVrsZ1/xY2xc7bdBGgKuVUJkkOA/22aWx8xFrU69fD oXc7wCBjAW5vSiCgbFqilaHpKUvX1VWzjPZ+eCOUHhrKUr7LoSxXBh9ZnhKo3LY= =gDT/ -----END PGP SIGNATURE-----