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This is the top level of the FreeBSD source directory. This file
was last revised on:
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.
For copyright information, please see the file COPYRIGHT in this
directory. Additional copyright information also exists for some
sources in this tree - please see the specific source directories for
The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree. See build(7), config(8),
for more information, including setting make(1) variables.
bin System/user commands.
cddl Various commands and libraries under the Common Development
and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
gnu Various commands and libraries under the GNU Public License.
Please see gnu/COPYING* for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
sys Kernel sources.
sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
used in release builds. NOTES contains documentation of
all possible entries.
tests Regression tests which can be run by Kyua. See tests/README
for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.
For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see: