Apache配置文件
Apache的配置文件默认路径是“/etc/httpd/conf/httpd.conf”，编辑该文件就可以修改Apache的配置
1、设置网页主目录，参数DocumentRoot就是网页存放的主目录。打开配置文件httpd.conf，查找DocumentRoot（大约292行）
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[root@localhost ~]# gedit /etc/httpd/conf/httpd.conf
# 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 "/var/www/html" //当前默认是在"/var/www/html"目录下，所有的网页必须放在这里
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2、设置连接端口，通过参数listen来设置连接的端口，默认80.（大约136行）
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[root@localhost ~]# gedit /etc/httpd/conf/httpd.conf
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, in addition to the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses (0.0.0.0)
#
#Listen 12.34.56.78:80
Listen 80
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3、设置连接超时，参数timeout，当连接超过一定的空闲时间，就会自动断开。（大约68行）
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# Timeout: The number of seconds before receives and sends time out.
#
Timeout 60
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4、设置字符集，参数AddDefaultCharset，建议最好设置utf-8，这是通用的。（大约753行）
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# Specify a default charset for all content served; this enables
# interpretation of all content as UTF-8 by default. To use the
# default browser choice (ISO-8859-1), or to allow the META tags
# in HTML content to override this choice, comment out this
# directive:
#
AddDefaultCharset UTF-8
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5、设置服务器名称，参数ServerName。这是服务器的域名，必须有dns解析才可以访问。如果你没有合法的域名，那么只能通过ip地址来访问
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# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If this is not set to valid DNS name for your host, server-generated
# redirections will not work. See also the UseCanonicalName directive.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
# You will have to access it by its address anyway, and this will make
# redirections work in a sensible way.
#
#ServerName www.example.com:80
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6、设置keepalive，提高网络效率，默认是关闭的。（大约76行）
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# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive Off
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7、设置keepaliverequest，设置为0 的时候没有限制，不过最好还是用默认值，或者自己根据情况来改变。（大约83行）
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# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend ou leave this number high, for maximum performance.
#
MaxKeepAliveRequests 100
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