FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms.
A large community has continually developed it for more than thirty years.
Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
See build(7), config(8), [FreeBSD handbook on building userland](https://docs.freebsd.org/en/books/handbook/cutting-edge/#makeworld), and [Handbook for kernels](https://docs.freebsd.org/en/books/handbook/kernelconfig/) for more information, including setting make(1) variables.
| gnu | Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see [gnu/COPYING](gnu/COPYING) and [gnu/COPYING.LIB](gnu/COPYING.LIB) for more information. |
| sys/`arch`/conf | Kernel configuration files. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries. |
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see [FreeBSD Handbook](https://docs.freebsd.org/en/books/handbook/cutting-edge/#current-stable).