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-lighttpd-php-fastcgi-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 17:52:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum abf2afcce163344edaf72914a58a78cf8f927aa5 * md5sum d1729269074f7885246d681e86ba731f 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) iQEcBAABAgAGBQJSXC88AAoJEIXCXpWhbrlNYKEIALB3MltHjzj4aLqFvzndFLHA ZDsiaLjWhBuJ2dCtRrdRdLRONUlRgwHZKpcgoHYW/WK65UzjwYA6sNJSoCESKJY0 CKiHsErWty+vnmQw5z9NaSvsvOaW+jqH8FWXx2c5zht6zDtSItRzscL4IOE17n/k mMzHA+FHRWqBbbeTBinOoIg7tu6NzClWy/RDDSafKUTlUWdO/IC2t825DdRHIxzC VjpWWoLzBrVGOukJadZ+Owkmf6KZ4BfhSGveAOH8DqbdlGAAeBQsJj4ZC7aJI3Wo ODxlQlRxxDle/jZweDeX/PdzhxIaF6bn9F0ABAdlFS1qg49UiWVfy19oYQKdZ2E= =+1Q7 -----END PGP SIGNATURE-----