CentOS7 安装nginx步骤

repo追加

Nginx官网有yum的repo公开，可以从这里下载安装。
首先进入服务器，切换到root权限下。在[/etc/yum.repos.d/]下创建文件nginx.repo。文件内容计入如下：

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
enabled=1

追加后可以通过ls命令查看

# ls -l /etc/yum.repos.d/
total 32
。。。
-rw-r--r--. 1 root root  100 Dec 24 01:53 nginx.repo

安装Nginx

确认nginx包

# yum info nginx
Available Packages
Name        : nginx
Arch        : x86_64
Epoch       : 1
Version     : 1.12.2
Release     : 1.el7_4.ngx
Size        : 716 k
Repo        : nginx/x86_64
Summary     : High performance web server
URL         : http://nginx.org/
License     : 2-clause BSD-like license
Description : nginx [engine x] is an HTTP and reverse proxy server, as well as
            : a mail proxy server.

执行安装
# yum install nginx

设定

系统启动时自动启动进程设定。

# systemctl enable nginx Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.

启动和停止

# systemctl start nginx

浏览器输入本地IP:80可以看到如下效果

Welcome to nginx!

如果打不开的话，可能时80端口没有打开。通过以下命令打开。
# firewall-cmd --add-service=http --zone=public --permanent
# firewall-cmd --reload
然后重启服务
# systemctl restart nginx

停止服务命令。
# systemctl stop nginx

各种路径

路径	说明
/etc/nginx/	Nginx 设定文件保存路径
/etc/nginx/nginx.conf	主设定文件路径
/var/log/nignx/	log保存路径
/usr/share/nginx/html/	web页面上公开html文件路径

/etc/nginx/nginx.conf 详解

默认内容

# cat /etc/nginx/nginx.conf 

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

各项设定内容，参考
https://www.cnblogs.com/liang-wei/p/5849771.html