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-phpbb-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 22:54:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4d7918b5f47af68d95f5499953fafcd7fdf2431a * md5sum 1029c22faac3192262ecd4ccff0b5cd0 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) iQEcBAABAgAGBQJRrnAfAAoJEIXCXpWhbrlN71oIAJP4PbwQMHVMcfHbfrBu0ip6 mN0IH9b8QvQX2rIs666Ep3hFfJOtxp9x3RqFfSXimoNMaz3EDra4FQoDII/kqTAh tTCapEv/P0+i/A5j8/N4WqRxjz+sFLf5FKkCwi4f58nZeNcjAfjr5gEZq6McfX3z iuFA4s2tJaFcDMzDu3hglZ6jq6bhKJ+CdNlKcJeO4AAGq2RGnPb7GTfoYpiMQKEG bjWfwdgbUDDq8JTU4t6/QZTHvCZDHCvtmFXLtE0Igv7jr9dNcCajshNbjaUYeZXS v/2aRJYzJpJpTmarmABWh2afYPZph74D9IgwkZ0ZwGiK8BnPi9d58EIifEajxxo= =i/0m -----END PGP SIGNATURE-----