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-typo3-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 19:50:53 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 93cd9affee49aab3ae8af2fbab05c29e0c2d29cf * md5sum f9a5d6b72b6ffd4e6e5d0d574ffac358 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) iQEcBAABAgAGBQJSXZyQAAoJEIXCXpWhbrlNd/oIAJakoueU1XJ0ajemxS9mn8ZI YdJSQjfaIGFWWS21g3H4LFmm72izAf7Zvd4AOCaGNYs8S3x695zNQMCqCtXUHt7O h0FXTLVVgG72k4o7rl9xvaPzmlj678n0Nn13IPoEcJFUzFXpEasNNG/+clvzwBjJ 0WEsxikV86qhwUdQht8qydJSPmSB/bS4DrQZdKvSYaYsYF8Y4cRR+p0wT/Xr8f2J uP+/IV2wzpBXAZiiVkkZdoYpZok2BCOZatoepqzb0h0E7X/aWwxpjlviH2iDz8m4 Y2YljLL3lztwlRR4Qg3mEa0WEtdYC7FguI6rEmnOVayFjNlJAkAKEi7tULRcmKI= =1HLq -----END PGP SIGNATURE-----