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-torrentserver-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:56:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 76723bc65b55a2fa5334880dd79796d3cc24e90f * md5sum 3f0b249f666e95a4588b3faa9d00f286 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) iQEcBAABAgAGBQJSXXPSAAoJEIXCXpWhbrlNlUcH+wfPGZc2yGogJuh7JKBaW3pE 9znCnwpW3ohIzJru83rKgMPwUDdqO2uFyaG/pwefsFmka63lueDO/laYnHKLBPPO 7tmn61qlBYxCsSzSi4MmrQfwNAfPZEx1LlysQz2xUb2i4gyvjJ2ULObODYLWm6rC /BOl0FviGukJyA+rSIy1Ijn7lJ4kyfjhgwqagtpXoM3+HcCgCXZroAyNbj/ngoR7 tz45tgpIeHfBLIkR7gHshWJpbOZI9I+Hr0mAN8uOhiwYEiRwLaDY5ipjKLvxGOkS KzJPQJLLi5ANPkrU3tDIB4DPUiN+r2i2Qt320+3iSvhPv3DV4vA5wKB74bLqjXQ= =FNAq -----END PGP SIGNATURE-----