安裝Nginx
yum install nginx
正常情況下必定是：
已加載插件：fastestmirror, langpacks base | 3.6 kB 00:00:00 docker-main | 2.9 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/2): extras/7/x86_64/primary_db | 122 kB 00:00:00 (2/2): updates/7/x86_64/primary_db | 2.9 MB 00:00:28 Loading mirror speeds from cached hostfile * base: mirrors.163.com * extras: mirrors.163.com * updates: mirrors.163.com 沒有可用軟件包 nginx。 錯誤：無須任何處理
遂百度查找，CentOS7系統庫中默認是沒有Nginx的rpm包的，所以我們自己需要先更新下rpm依賴庫。。。
#rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
還是去Nginx官網看了下官方的說法，點擊這里（Install|NGINX）。
a、先創建一個yum的一個repository文件：/etc/yum.repos.d/nginx.repo；
b、然后將下面配置黏貼進文件后保存。
[nginx] name=nginx repo baseurl=http://nginx.org/packages/centos/$releasever/$basearch/ gpgcheck=0 enabled=1
接下來基本上就順了。
(1)安裝Nginx #yum install nginx (2)啟動Nginx #service nginx start 或 #systemctl start nginx.service
測試一下是否正常。
curl http://127.0.0.1
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>