设定apache 的管理员邮件地址。
#
# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "/usr/local/apache2/htdocs"
设定apache web server 的文档根目录，必须是绝对路径。
<Directory "/usr/local/apache2/htdocs">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
# The Options directive is both complicated and important. Please see
# http://httpd.apache.org/docs-2.0/mod/core.html#options
# for more information.
#
Options Indexes FollowSymLinks
#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# Options FileInfo AuthConfig Limit
#
AllowOverride None
#
# Controls who can get stuff from this server.
#
Order allow,deny
Allow from all
</Directory>
设定文档根目录的权限控制，必须和DocumentRoot "/usr/local/apache2/htdocs" 中指定的目录一致。
#
# The index.html.var file (a type-map) is used to deliver content-
# negotiated documents. The MultiViews Option can be used for the
# same purpose, but it is much slower.
#
DirectoryIndex index.html
指定该目录下的索引文档，
ScriptAlias /cgi-bin/ "/usr/local/apache2/cgi-bin/"
映射cgi-bin的根目录，必须是绝对路径。
<Directory "/usr/local/apache2/cgi-bin">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
设定cgi-bin目录的读写权限，该目录项必须和上一条的设置一致。