Directories

The directories in the server source are laid out ad follows:

Documentation

Directory	Description
`doc/`	Various snippets of documentation.
`doc/introduction/`	Concepts and introduction to FreeRADIUS.
`doc/developers/`	Developer documentation for internal APIs
`doc/unlang/`	The unlang processing language.
`doc/upgrade/`	How to upgrade from version 3 to version 4.
`doc/rfc/`	Copies of the RFC’s. If you have Perl, do a `make` in that directory, and look at the HTML output.
`doc/antora/`	Metadata and documentation source files to build an Antora based documentation site.
`doc/doxygen/`	Files to build a Doxygen site from the source code.
`man/`	Unix Manual pages for the server, configuration files, and associated utilities.

Directory	Description
`mibs/`	SNMP Mibs for the server.
`scripts/`	Sample scripts for startup and maintenance.

Directory	Description
`raddb/`	Sample configuration files for the server.
`raddb/mods-available`	Module configuration files.
`raddb/mods-enabled`	Directory containing symlinks to `raddb/mods-available`. Controls which modules are enabled.
`raddb/sites-available`	Virtual servers.
`raddb/sites-enabled`	Directory containing symlinks to `raddb/sites-available`. Control which virtual servers are enabled.

Directory	Description
`debian/`	Files to build a `freeradius` Debian Linux package.
`redhat/`	Additional files for a RedHat Linux system.
`suse/`	Additional files for a SuSE (UnitedLinux) system.

Directory	Description
`src/`	Source code.
`src/bin/`	Source code for the daemon and associated utilities.
`src/lib/`	Source code for various utility libraries.
`src/include/`	Header files.
`src/protocols/`	Dynamic frontend plug-in modules.
`src/modules/`	Dynamic backend plug-in modules.