CentOS7.2安装Nginx的方法步骤

CentOS7.2安装Nginx过程笔记，由于学习的需要，这段时间学一点“nginx”。今天学习一下Nginx安装，留个笔记

查看CentOS的版本

使用一下命令来查看一下当前系统的版本

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

添加资源库

在 CentOS 系统上安装 Nginx ，你得先去添加一个资源库，像这样：

vim /etc/yum.repos.d/nginx.repo

使用 vim 命令去打开 /etc/yum.repos.d/nginx.repo ，如果 nginx.repo 不存在，就会去创建一个这样的文件，打开以后按一下小 i 键，进入编辑模式，然后复制粘贴下面这几行代码，完成以后按 esc 键退出，再输入:wq （保存并退出）

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0
enabled=1

yum 命令去安装 nginx

完成上边操作以后，我们就可以使用 yum 命令去安装 nginx 了

yum install nginx

安装成功：

Loaded plugins: fastestmirror, langpacks
nginx                          | 2.9 kB   00:00   
nginx/7/x86_64/primary_db                 | 14 kB  00:01   
Loading mirror speeds from cached hostfile
 * base: mirrors.sina.cn
 * extras: mirrors.btte.net
 * updates: mirrors.sina.cn
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 1:1.10.1-1.el7.ngx will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package    Arch      Version            Repository   Size
================================================================================
Installing:
 nginx     x86_64     1:1.10.1-1.el7.ngx      nginx     640 k

Transaction Summary
================================================================================
Install 1 Package

Total download size: 640 k
Installed size: 2.1 M
Is this ok [y/d/N]: y
Downloading packages:
nginx-1.10.1-1.el7.ngx.x86_64.rpm             | 640 kB  00:27   
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
 Installing : 1:nginx-1.10.1-1.el7.ngx.x86_64               1/1 
----------------------------------------------------------------------

Thanks for using nginx!

Please find the official documentation for nginx here:
* http://nginx.org/en/docs/

Commercial subscriptions for nginx are available on:
* http://nginx.com/products/

----------------------------------------------------------------------
 Verifying : 1:nginx-1.10.1-1.el7.ngx.x86_64               1/1 

Installed:
 nginx.x86_64 1:1.10.1-1.el7.ngx                        

Complete!

测试nginx配置文件

当你执行 nginx -t 得时候，nginx会去测试你得配置文件得语法，并告诉你配置文件是否写得正确，同时也告诉了你配置文件得路径：

nginx -t

打印如下：

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

说明配置文件成功！

centos7.0+ nginx实现停止、启动、重启

在CentOS7中，进行chkconfig命令操作时会发现有类似“systemctl.....”的提示，systemctl可以简单实现service和chkconfig的结合，这样通过一个命令就可以实现两个命令的功能。

systemctl命令的基本操作格式是：

systemctl [OPTIONS...] {COMMAND}...

以nginx服务为例，实现停止、启动、重启的动作如下：

systemctl stop  nginx.service
systemctl start  nginx.service
systemctl restart nginx.service

检查服务状态

systemctl status nginx.service

使服务开机启动

systemctl enable nginx.service

取消服务开机启动

systemctl disable nginx.service