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-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:11:02 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 53ab7399463d78ec933e2b4bd343d91eeddbea7f * md5sum 32f6366c4fcafe451c34026ea604fc29 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) iQEcBAABAgAGBQJQM3rLAAoJEIXCXpWhbrlNqVAIAJ6nr3JuSiri4rIGPzc81yql csRw6G0EODTvF4abmlyh2TZjfgrLIp9/0xWwc7SuftzCqLBh/ZWJnaGLT/Ml+Jjs O9ufgrPDjnxfRaw16diIdjIgeXDD/yOTq90xAWAlqhJyJFCEs8nU9x+bE5jjeVsf AhVjcuP4rJxXvcXdmiHRREHiApd40JNBYiTuWtycVHk8zPraCO4Cx932laaMVMwF lu9o94Ude58xIW+03H6LCtECW/e2IlaSbvpayf/bDDFnpg/1d5prPFms4G6UBq/a OzONg4ZPfm38G+MMUhWoNWlFrwpt46/mK+3E7RgC7BIciML2fJSbB04z+zUAe0I= =AV/J -----END PGP SIGNATURE-----