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-typo3-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Wed Jun 5 00:58:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6e69dc9c25f7b99ff8fa2332a31fdf71fd87db41 * md5sum 9950316c241f6a56b3913a35dfb7c235 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) iQEcBAABAgAGBQJRro0pAAoJEIXCXpWhbrlN5gEIANCZeYzmrJ+TdkPE2rsPoEss 4la8QYv3UrXhY3ajA7wB86tQJdDDIGn+x0CHOvWD2rqBX3EWi4ygobFu8G2Pcb1q KpqlmYZf3h6fl2+osn8g2CEtFwp4oENHQvxwRabxLXkz8LkyBzIuFTmwQkz6pcD0 dXIZJ6ya/TJZEsqhtZVN+iFmV2XYPUJFsQn6ahps6ZT/WBBTtlDT76E6CzUd+Rb1 qI7VwO0ZmXx1qTZPbdDbA/h2cPZzHoqds0fq7/DZIlLFoP5lUZH1LPokJK6f+jzW Lsk97Om6ff5sAXvalvApCaoJ3dDWu5fEgIBZB4bK24H4Axt7b5p3UT9EQFisLj0= =TNAO -----END PGP SIGNATURE-----