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-zencart-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Wed Jun 5 01:25:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f481c36dba0fa253f6725401b63a7dae3a57975b * md5sum 1df9bb94a845e049c54f9790f31790d1 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) iQEcBAABAgAGBQJRrpOCAAoJEIXCXpWhbrlN6/wH/A+NTrM7ZKsAiqjtt3QPOk25 bkb1BPP+OqDtxElRECtpHM9JIPOi3wTBXJF7HJN1byhkd2hDGGGbNkj0KCdZRn4I rOZxJ1baA/9WfVi11EkAuEIwIz30zY52nI13nY2LnlOWAH19wM1rIic54pXtW58k HHwGafrnPM56jZb/nM/520kFlYBo3eaB5B5MT+S1kfZZuaPzQK+6j3a1+5/ryOeH veYyB33d1XpW5pHFG2t8idd0ESFZ/rBZHX1xwqu9++TydV4GDVvlCCTGZ6lrWFOX ew1pC4uJ4ZvpbKkCWs550RN1aKiinUca4zyltZDgqJJwZLTOwj3CurqymYciwwM= =+Ckx -----END PGP SIGNATURE-----