You are looking at the documentation for the 1.3 version of the Apache HTTP Server, which is no longer maintained, and has been declared "end of life". If you are in fact still using the 1.3 version, please consider upgrading. The current version of the server is 2.4.
NAME httpd - Apache hypertext transfer protocol server SYNOPSIS httpd [ -X ] [ -R libexecdir ] [ -d serverroot ] [ -f config ] [ -C directive ] [ -c directive ] [ -D parameter ] httpd [ -h ] [ -l ] [ -L ] [ -v ] [ -V ] [ -S ] [ -t ] [ -T ] DESCRIPTION httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will create a pool of child processes to handle requests. To stop it, send a TERM signal to the initial (parent) process. The PID of this pro- cess is written to a file as given in the configuration file. Alternatively httpd may be invoked by the Internet daemon inetd(8) each time a connection to the HTTP service is made. This manual page only lists the command line arguments. For details of the directives necessary to configure httpd see the Apache manual, which is part of the Apache distribution or can be found at http://www.apache.org/. Paths in this manual may not reflect those compiled into httpd. OPTIONS -R libexecdir This option is only available if Apache was built with the SHARED_CORE rule enabled which forces the Apache core code to be placed into a dynamic shared object (DSO) file. This file is searched in a hardcoded path under ServerRoot per default. Use this option if you want to override it. -d serverroot Set the initial value for the ServerRoot direc- tive to serverroot. This can be overridden by the ServerRoot command in the configuration file. The default is /usr/local/apache. -f config Execute the commands in the file config on startup. If config does not begin with a /, then it is taken to be a path relative to the Server- Root. The default is conf/httpd.conf. -C directive Process the configuration directive before read- ing config files. -c directive Process the configuration directive after read- ing config files. -D parameter Sets a configuration parameter which can be used with <IfDefine>...</IfDefine> sections in the configuration files to conditionally skip or process commands. -h Output a short summary of available command line options. -l Output a list of modules compiled into the server. -L Output a list of directives together with expected arguments and places where the direc- tive is valid. -S Show the settings as parsed from the config file (currently only shows the virtualhost settings). -t Run syntax tests for configuration files only. The program immediately exits after these syntax parsing with either a return code of 0 (Syntax OK) or return code not equal to 0 (Syntax Error). -T Same as option -t but does not check the config- ured document roots. -X Run in single-process mode, for internal debug- ging purposes only; the daemon does not detach from the terminal or fork any children. Do NOT use this mode to provide ordinary web service. -v Print the version of httpd , and then exit. -V Print the version and build parameters of httpd , and then exit. FILES /usr/local/apache/conf/httpd.conf /usr/local/apache/conf/srm.conf /usr/local/apache/conf/access.conf /usr/local/apache/conf/mime.types /usr/local/apache/conf/magic /usr/local/apache/logs/error_log /usr/local/apache/logs/access_log /usr/local/apache/logs/httpd.pid SEE ALSO inetd(8).