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+Organization of the source directory
+====================================
+
+Below is a brief overview of the organization of the complete source
+directory.  More detailed descriptions follow.
+
+=============== ==============================================
+appl             Kerberos application client and server programs
+ccapi            Credential cache services
+clients          Kerberos V5 user programs (See :ref:`user_commands`)
+config           Configure scripts
+config-files     Sample Kerberos configuration files
+gen-manpages     manpages for Kerberos V5 and the Kerberos V5 login program
+include          include files needed to build the Kerberos system
+kadmin           Administrative interface to the Kerberos master database: :ref:`kadmin(1)`, :ref:`kdb5_util(8)`, :ref:`ktutil(1)`.
+kdc              Kerberos V5 Authentication Service and Key Distribution Center
+lib_             Libraries for use with/by Kerberos V5
+plugins          Kerberos plugins directory
+po               Localization infrastructure
+prototype        Templates files containing the MIT copyright message and a placeholder for the title and description of the file.
+slave            Utilities for propagating the database to slave KDCs :ref:`kprop(8)` and :ref:`kpropd(8)`
+tests            Test suite
+util_            Various utilities for building/configuring the code, sending bug reports, etc.
+windows          Source code for building Kerberos V5 on Windows (see windows/README)
+=============== ==============================================
+
+
+.. _lib:
+
+lib
+---
+
+The lib directory contain several subdirectories as well as some
+definition and glue files.
+
+  - The apputils directory contains the code for the generic network
+    servicing.
+  - The crypto subdirectory contains the Kerberos V5 encryption
+    library.
+  - The gssapi library contains the Generic Security Services API,
+    which is a library of commands to be used in secure client-server
+    communication.
+  - The kadm5 directory contains the libraries for the KADM5
+    administration utilities.
+  - The Kerberos 5 database libraries are contained in kdb.
+  - The krb5 directory contains Kerberos 5 API.
+  - The rpc directory contains the API for the Kerberos Remote
+    Procedure Call protocol.
+
+
+.. _util:
+
+util
+----
+
+The util directory contains several utility programs and libraries.
+  - the programs used to configure and build the code, such as
+    autoconf, lndir, kbuild, reconf, and makedepend, are in this
+    directory.
+  - the profile directory contains most of the functions which parse
+    the Kerberos configuration files (krb5.conf and kdc.conf).
+  - the Kerberos error table library and utilities (et);
+  - the Sub-system library and utilities (ss);
+  - database utilities (db2);
+  - pseudo-terminal utilities (pty);
+  - bug-reporting program send-pr;
+  - a generic support library support used by several of our other
+    libraries;
+  - the build infrastructure for building lightweight Kerberos client
+    (collected-client-lib)
+  - the tool for validating Kerberos configuration files
+    (confvalidator);
+  - the toolkit for kernel integrators for building krb5 code subsets
+    (gss-kernel-lib);
+  - source code for building Kerberos V5 on MacOS (mac)
+  - Windows getopt operations (windows)