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-cakephp-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 14:51:14 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 073ec5b7d707e4f375f704dc003c9f038c3fb0ab * md5sum 5473e4c3d6a99d7f2f997082dc225036 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) iQEcBAABAgAGBQJSXVZYAAoJEIXCXpWhbrlNkeMIAI8Gf9yc06gf4Sk9fIUzcNX3 ntS6/F0Fwmj5fV3Wft1/cBdWMx3AlfC7oEJtP3hDaJXi/+aAvbaaVZa9Ttuhd6LP OErCcR3gEh/OLT3CYn5J5z8Hg84G4hF+Z+Jtct8uiStIAZ1E3pLoOxhGatfoyk4x B6JAJuhkWURag/JAjR2YDfLnQWw1BOQ8NDtvMnRQyuP1+ywPoqJ5xqs5FYtbm+nY XPkzWlquGjPqqElzg9cmhKRdX0FF04HkdE/1dBVgWLRiobGHBuR1oq1ggw9WR0ps yB3CVOkeGcUS7tYQbK7KOgel+VmHVF81G2CPUUaJge9aFlcSc7QcwrwwBSWZjpc= =UM6M -----END PGP SIGNATURE-----