跨internet的主機間通訊：
在建立通信連接配接的每一端，程序間的傳輸要有兩個标志：
ip位址和端口号，合稱為套接字位址 socket add 标記唯一的應用程式；
客戶機套接字位址定義了一個唯一的客戶程序
伺服器套接字位址定義了一個唯一的伺服器
socket:套接字，程序間通信ipc的一種實作，允許位于不同主機（或同一主機）上不同程序之間進行通信和資料交換
[root@named ~]# locate *.jpg
靜态檔案：無需服務端做出額外處理檔案字尾：.jpg, .html, .txt, .js, .css, .mp3, .avi
動态檔案：服務端執行程式，傳回執行的結果檔案字尾：.asp, .php, .jsp
持久連接配接：
keepalived
telnet node02 80
get /index.html http/1.1
host: 3.3.3.3
frag :apache docment文檔
pv:統計
[root@node02 ~]# cat /var/log/httpd/access_log |wc -l
108
https://httpd.apache.org/docs/2.4/mod/quickreference.html
2、修改監聽的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）多路處理子產品
prefork, worker, event（試驗階段）
httpd-2.2不支援同時編譯多個子產品，是以隻能編譯時標明一個；rpm安裝的包提供三個二進制程式檔案，分别用于實作對不同mpm機制的支援
确認方法：psaux | grep httpd
預設為/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
測試結果:
[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、定義'main' server的文檔頁面路徑
documentroot “/path”
文檔路徑映射：documentroot指向的路徑為url路徑的起始位置
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、定義站點首頁面
directoryindex index.html index.html.var
主站點: mkdir /data/website ＞＞ ｎews
mkdir /app/football >> ln -s /app/footbal sports >> sports 指向 軟連結
curl node02/news >> /data/website/news/index.html
curl node02/sports >> /app/football/index.html
８權限拒絕:
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 ＃預設
logformat "%h %l %u %t \"%r\" %>s %b" common
</ifmodule>
[root@node02 html]# cat index.html
<title>京東(jd.com)-正品低價、品質保障、配送及時、輕松購物！</title>
welcome to magdu
<html>
<head>
<title>html語言
</title>
</head>
<body>
<img src="sunflower.jpg" >
<img src="https://img10.360buyimg.com/img/jfs/t1/159353/17/2928/457625/5ffd107fe2b4a7a10/e0ab266497850f64.gif" >
标題1
<p><a rel="nofollow" href=http://node02/test2.html>馬哥教育</a>歡迎你</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： 響應封包location指明資源臨時新位置 moved temporarily
[root@centos6 ~]#curl -i www.jd.com
http/1.1 302 moved temporarily
curl -a "ie" http://192.168.137.47 代理伺服器：
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 網址的來源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 主機頭：
curl -i -v www.a.com
curl -v -h "host: www.c.com" www.a.com 主機頭：通過主機頭判斷通路的是哪個網站
--basic使用http 基本認證：
c
curl -l www.jd.com 顯示網站資訊
curl -0 www.a.com 顯示版本1.0
curl -v www.a.coom
curl -c cookie.log 192.168.137.47/setcookie.php下載下傳cookie
cat cookie.log
curl -i -x options 192.168.137.47 想代理伺服器發送指定請求方法；
links 192.168.137.47
links 192.168.47 -dump 文字
links 192.168.137.47 -source 看源碼
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]