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-phplist-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 17:41:55 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0a5a7f2c737295ce875a55caa74653407fdeec45 * md5sum c1ffecd500429847755d3a5d418de3cd 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXX5ZAAoJEIXCXpWhbrlNDtMIALNhM3/8LMq0NA1TUT5JLjwU PC3CdSeIfq4sHL37wae5NiLVWd7pabfUfw0mByCsyt8wqN6vhH+BY9RqRzXWVbwc t9kkwiIX5L5onVxNapQhZEDpzWf6dLARQUT2eN0osP3FQJY0KqMJkfAEB+EAUAPR 1WBOXZ7l3ij3nbWkOMu70GQnfF2T4bZSSQc266e5NztVJ6ogf0DVIA88+2eoFdIX VIcb5/o9Kd4ESTA6owdMH6ukyNjB6SvSSo4w9i2Rj04oTYJNYl0eNIfbDNuRML3B HI96j7eY8PAaA8d4PTnfxS6iqB8xDy60SbRlYgVC4cMKgnHYLrVGpD8WZJq4ElE= =frLd -----END PGP SIGNATURE-----