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-zurmo-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Wed Jun 5 01:27:15 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a0c5ec0558e92180c2bace53a938023c39669e63 * md5sum bc582b122c8e4948924709e58adc2c00 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) iQEcBAABAgAGBQJRrpPmAAoJEIXCXpWhbrlNAJEH/jZ7JaBVBk/2Td/VsfBARNL9 MLTpHt2c13d2uRgjCs9IRoGseEWAaIW1k+iPYz7VuQZr9zBWf+tMqVjEvkHGZZI3 YY0tSd0ET0PYbK9Lib9vT6g8PboSyFUOq9v0NCmRpu8Ln3LkUrH85wTacbAfYCAK aFuZpUKirZn3pfM0os/aD7sugzBBrquv0lBPFHfeSOIC5vZ9FddZS6bnultu76dJ gVigi1Aspv4+p0sNP2P+QU3UQLP42mEIu4s0OZBWDHOpp7SQYGXVqX+4wJywFpp4 0k5lZGe2QUmy/FX/m4hzYmIReSDpmbcEUdZLICBYQKmLC1vm3YWWw2zMcmpSPZI= =ZjYw -----END PGP SIGNATURE-----