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-symfony-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 16:22:32 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ad8b9ae647d359f0d02199e1a00495c47f34d82a * md5sum 8b1274f8a8b65126711069fdb091f148 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) iQEcBAABAgAGBQJRrhQ9AAoJEIXCXpWhbrlNGewH/iAFd2+V61vTBtrT2JDDBOzl nTyai5NOVdR9h+vnZVtTOk2/bDQDlEBzrM/dhW02v62n0x03DKAn4U48j2IRiCQv ZJi27nrqqhDvvynMKLK+rp2oDPkxk9Tly5dz3zYrsAEfb+ZQzRpi8sYxwwlcbEpu 4vTnnT8SCdtlQt0WaqnHYR/hZHFruaXXmbOfNTDu2eZ13sz7VjQO3h9eEA7qOpVv bKOTFrOm64FdWAAPRLYRcgTIOIQqNry2dVeuVRIRrR3ege8lVvg73DSS9SuxllZb mmiTUrHwjp+VHJMlbqetRR6fRHgn+vgx+Phr/IGBJFJd21q2yhE/Cxfk1DG2juc= =RQ6j -----END PGP SIGNATURE-----