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-b2evolution-13.0-wheezy-i386-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 08:49:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ee346da6cb9532d2df252185ab2a492e1f3b67eb * md5sum 6c4faaa549a30ce37bfa88509844064d 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) iQEcBAABAgAGBQJSc2sHAAoJEIXCXpWhbrlNiv8IAL5X8OTXBRE7d1HVso2Cm5ZL TJdUrL+K7bKp287Dgiu9IJ0pm/9rxc+ALLI+jdBTc6r/+PYDFnfhXSQU53O275dZ 41BTrQjvipXuDVkX+gmjBnLblBRzk8MJEFugAQInOnjrUejm7NYTdiByZSYw8fiP WmPanAgoRTv2ite46oYjzGy4Vcw+SvEMtmEw3sBj+N+xo1ZPf2uwNLsELIjXAZFS F/5XN+hF3SYkHkyPppROF+SeB8TSc/RkgyS1lObF5kf9p7u9Xwn1a5437xu1TVq6 3x8cTmIk8uyTjhKWpBpNkPoliKWApUDZK/mtWalEJ8ILhpGX8oIccGvEu7I6pfA= =3C5e -----END PGP SIGNATURE-----