DragonFly是一份作为FreeBSD-4.x系列在逻辑上的延续而设计的操作系统及应用环境。这些操作系统与Linux可归为相同的类别，因为它们都基于UNIX理念及应用程序接口。DragonFly是这条发展道路上的一个分支，可以说，是给了BSD一个向着不同于FreeBSD-5系列的崭新方向而发展的机会。

        Matthew Dillon has announced the release of DragonFly BSD 2.2, a BSD operating system originally forked from FreeBSD 4.8: "The DragonFly 2.2 release is here! The HAMMER filesystem is considered production-ready in this release; it was first released in July 2008. The 2.2 release represents major stability improvements across the board, new drivers, much better pkgsrc support and integration, and a brand new release infrastructure with multiple target options. Three release options are now available - our bare-bones CD ISO, a DVD ISO which includes a fully operational X environment, and a bare-bones bootable USB disk-key image (less than 512M). We offer over 7,300 pre-built pkgsrc packages for this release. The pkg_radd(1) utility may be used to download pre-built binary packages. By default, this script will query the main package site for a random redirect to one of our mirrors." Read the detailed release notes for further information. Download (MD5): dfly-gui-2.2.0_REL.iso.gz (515MB), dfly-2.2.0_REL.iso.gz (183MB).（责任编辑：A6）