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-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:35:22 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b8fa66df25a6b49e93f666da9b733948926fca45 * md5sum a49752a4cc2f7d15ba51b6f844281e19 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) iQEcBAABAgAGBQJSAgbBAAoJEIXCXpWhbrlNcOgIAOuMl5uq8nHo9BAMCV5HgVSV XEQoeEwHky9nvKEpu4haYaEhKkDGg2pEQNXoB4Yas2l731DdCbaCq7k0oMSo2D3F rISAjiJsyaFB2zq6WAXR73jEeQuFEhuhipx7A8i+X7jB1aAr6f+euddDUXRD+jOh 7SPo2XkKkzwd9o7y29YkbcXVgbdgTT05Y75nI3urpPDlMBKPLtCr3omtpTt49rKT kjcz+Lcc2rD36F8a60RLRcQ08nJebPwlfQ35aSA1FxwTbqL11h+mBsaiA9V5WPkc EY/pW8flEnt2/QOYolVHhLE6E8do3EHPh3OLsnPA4cAtAeH/cWoclRr7rFFrqEw= =2dX4 -----END PGP SIGNATURE-----