跨internet的主机间通讯：
在建立通信连接的每一端，进程间的传输要有两个标志：
ip地址和端口号，合称为套接字地址 socket add 标记唯一的应用程序；
客户机套接字地址定义了一个唯一的客户进程
服务器套接字地址定义了一个唯一的服务器
socket:套接字，进程间通信ipc的一种实现，允许位于不同主机（或同一主机）上不同进程之间进行通信和数据交换
[root@named ~]# locate *.jpg
静态文件：无需服务端做出额外处理文件后缀：.jpg, .html, .txt, .js, .css, .mp3, .avi
动态文件：服务端执行程序，返回执行的结果文件后缀：.asp, .php, .jsp
持久连接：
keepalived
telnet node02 80
get /index.html http/1.1
host: 3.3.3.3
frag :apache docment文档
pv:统计
[root@node02 ~]# cat /var/log/httpd/access_log |wc -l
108
https://httpd.apache.org/docs/2.4/mod/quickreference.html
2、修改监听的ip和port
listen 0 128 :::80 :::*
[root@node02 conf.d]# cat test.conf
servertokens prod
keepalivetimeout 50
keepalivetimeout 15
4、mpm（multi-processing module）多路处理模块
prefork, worker, event（试验阶段）
httpd-2.2不支持同时编译多个模块，所以只能编译时选定一个；rpm安装的包提供三个二进制程序文件，分别用于实现对不同mpm机制的支持
确认方法：psaux | grep httpd
默认为/usr/sbin/httpd, 即prefork模式
[root@node02 conf.modules.d]# ab -c 100 -n 2000 http://node02/
[root@node02 conf.modules.d]#
loadmodule mpm_event_module modules/mod_mpm_event.so
测试结果:
[root@node02 conf.modules.d]# ls
00-base.conf 00-lua.conf 00-proxy.conf 01-cgi.conf
00-dav.conf 00-mpm.conf 00-systemd.conf 10-php.conf
[root@node02 conf.modules.d]# grep basic *
00-base.conf:loadmodule auth_basic_module modules/mod_auth_basic.so
[root@node02 conf.modules.d]# httpd -l
compiled in modules:
core.c
mod_so.c
http_core.c
6、定义'main' server的文档页面路径
documentroot “/path”
文档路径映射：documentroot指向的路径为url路径的起始位置
示例：
documentroot"/app/data“
http://host:port/test/index.html --> /app/data/test/index.html
[root@node02 data]# curl node02/
happy new year
7、定义站点主页面
directoryindex index.html index.html.var
主站点: mkdir /data/website ＞＞ ｎews
mkdir /app/football >> ln -s /app/footbal sports >> sports 指向 软链接
curl node02/news >> /data/website/news/index.html
curl node02/sports >> /app/football/index.html
８权限拒绝:
curl node02/php.conf
```[root@node02 conf.d]# pwd
/etc/httpd/conf.d
vim /etc/httpd/conf.d
<location "/conf">
<requireall>
require all granted
require not ip 192.168.100.10
</requireall>
</location>
documentroot "/app/data"
<directory /web/docs>
options ＋indexes -followsymlinks
</directory>
loglevel warn
<ifmodule log_config_module>
logformat "%h %l %u %t \"%r\" %>s %b \"%{referer}i\" \"%{user-agent}i\"" combined ＃默认
logformat "%h %l %u %t \"%r\" %>s %b" common
</ifmodule>
[root@node02 html]# cat index.html
<title>京东(jd.com)-正品低价、品质保障、配送及时、轻松购物！</title>
welcome to magdu
<html>
<head>
<title>html语言
</title>
</head>
<body>
<img src="sunflower.jpg" >
<img src="https://img10.360buyimg.com/img/jfs/t1/159353/17/2928/457625/5ffd107fe2b4a7a10/e0ab266497850f64.gif" >
标题1
<p><a rel="nofollow" href=http://node02/test2.html>马哥教育</a>欢迎你</p>;
</body>
</html>
[root@node02 html]# cat test2.html
test2
<location /status>
sethandler server-status
require all granted ＃＃reauire ip 192.168.137.6
[root@node02 ~]# cat /etc/httpd/conf.d/test.conf
listen 8001
listen 8002
listen 8003
<virtualhost *:8001>
documentroot /data/web1
servername www.a.com
<directory /data/web1>
</virtualhost>
<virtualhost *:8002>
documentroot /data/web2
<directory /data/web2>
<virtualhost *:8003>
documentroot /data/web3
<directory /data/web3>
<virtualhost 192.168.100.30:80>
<virtualhost 192.168.100.40:80>
<virtualhost 192.168.100.50:80>
[root@node02 ~]# cat /etc/httpd/conf.d/test.conf
logformat "%h %l %u %{%y-%m-%d %h:%m:%s}t \"%r\" %>s %b \"%{referer}i\" \"%{user-agent}i\"" testlog
customlog "logs/access_log" testlog
<virtualhost *:80>
customlog "logs/a_access_log" testlog
errorlog "logs/a_error_log"
<virtualhost *:80>
servername www.b.com
customlog "logs/b_access_log" testlog
errorlog "logs/b_error_log"
servername www.c.com
customlog "logs/c_access_log" testlog
errorlog "logs/c_error_log"
curl -i -x options www.a.com
[root@centos6 ~]#curl -i www.360buy.com
http/1.1 301 moved permanently
302： 响应报文location指明资源临时新位置 moved temporarily
[root@centos6 ~]#curl -i www.jd.com
http/1.1 302 moved temporarily
curl -a "ie" http://192.168.137.47 代理服务器：
192.168.137.6 - - [09/aug/2018:20:09:45 +0800] "get / http/1.1" 200 31 "-" "ie"
curl -a "ie20" -e "http://www.baidu.com" http://192.168.137.47 网址的来源url
192.168.137.6 - - [09/aug/2018:20:15:44 +0800] "get / http/1.1" 200 31 "http://www.baidu.com" "ie20"
curl -h “host":www.a.com www.a.com /data/web2 主机头：
curl -i -v www.a.com
curl -v -h "host: www.c.com" www.a.com 主机头：通过主机头判断访问的是哪个网站
--basic使用http 基本认证：
c
curl -l www.jd.com 显示网站信息
curl -0 www.a.com 显示版本1.0
curl -v www.a.coom
curl -c cookie.log 192.168.137.47/setcookie.php下载cookie
cat cookie.log
curl -i -x options 192.168.137.47 想代理服务器发送指定请求方法；
links 192.168.137.47
links 192.168.47 -dump 文字
links 192.168.137.47 -source 看源码
country name (2 letter code) [xx]:cn
state or province name (full name) []:beijing
locality name (eg, city) [default city]:beijing
organization name (eg, company) [default company ltd]:magedu.com
organizational unit name (eg, section) []:opt
common name (eg, your name or your server's hostname) []:ca.magedu.com
organization name (eg, company) [default company ltd]magedu.com
common name (eg, your name or your server's hostname) []:www.magedu.com
email address []:
header always set strict-transport-security "max-age=31536000"
rewriteengine on
rewriterule ^(/.*)$ https://%{http_host}$1 [redirect=302]