yum -y install nginx

原来的nginx.conf里，第一行是

user ngix;  # 不同版本的不一样

改为

user root;

[root@VM_0_9_centos ~]# find / -name nginx.conf
/var/opt/gitlab/nginx/conf/nginx.conf
/opt/gitlab/embedded/lib/ruby/gems/2.4.0/gems/unicorn-5.1.0/examples/nginx.conf
/opt/gitlab/embedded/conf/nginx.conf  
/etc/nginx/nginx.conf  # 这个是要找的文件

/usr/share/nginx/html  # 默认的

配置写在http { } 里面，与其他server 同级别。

	autoindex on;# 显示目录
	autoindex_exact_size on;# 显示文件大小
	autoindex_localtime on;# 显示文件时间

	server {
		listen       8080 default_server;
		listen       [::]:8080 default_server;
		server_name  _;
		#root         /usr/share/nginx/html;
		root         /data/;

		location / {
		}

		error_page 404 /404.html;
			location = /40x.html {
		}

		error_page 500 502 503 504 /50x.html;
			location = /50x.html {
		}
	}

service nginx start
service nginx stop 
service nginx restart   # 重启
nginx -s reload   # 修改配置后重启，或者使用reload重载配置文件

user root;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    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;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

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

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;
        include /etc/nginx/conf.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

	autoindex on;# 显示目录
	autoindex_exact_size on;# 显示文件大小
	autoindex_localtime on;# 显示文件时间

	server {
		listen       6868 default_server;
		listen       [::]:6868 default_server;
		server_name  _;
		#root         /usr/share/nginx/html;
		root         /;

		location / {
		}

		error_page 404 /404.html;
			location = /40x.html {
		}

		error_page 500 502 503 504 /50x.html;
			location = /50x.html {
		}
	}

}