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-tomatocart-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 16:21:31 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 648b0b2063c8115701a4a6562a060f33de29de3b * md5sum 2d38a8653a3613fafe9b671792ab0f00 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) iQEcBAABAgAGBQJRrhQBAAoJEIXCXpWhbrlNVdgH/1H4MtN1HeJflOR5lsebpVDK eoiHi2V79BW6cSmC8pS5o7ZmTRLk/LejkPc2HrW+VpxPCxVAAxBs41Uf6M73TF58 87EUVhcbfdGsddAS7lWJFXO4Hu1zUEwwS1J+lV28W4sOMcc4ebNpk594jM3SesfZ hloNDjPx/IegLyujGZTXFR3seqlqy8OG9qnozqAQo4PUN/g2a5siitRIciVaWkRW /iEvMag4cdo8GECfPGKgZJbXcZc5bJjLsq3RSSyxnBZMqxJoIiTYB5r9xPs4aOFc PkHW/plHVFRC+AzPEu4voMdpUVafDXnQ1Te12s0UAh49doaJxZv3IytRVZYpV+M= =TUS1 -----END PGP SIGNATURE-----