0. 错误状态

Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
invoke-rc.d: initscript nginx, action "start" failed.
● nginx.service - A high performance web server and a reverse proxy server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Fri 2018-06-08 17:21:27 CST; 7ms ago
  Process: 20300 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
  Process: 20295 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)

1. 问题分析

本机已经使用了80端口，与nginx默认端口冲突

2. 解决方法

• 修改nginx配置文件
  • 打开 /etc/nginx/sites-available 的 default文件

    sudo cd /etc/nginx/sites-available
    sudo vim default
    

  • 修改default文件
    将其中的80换成不冲突的端口

        server {
        listen 80 default_server;
        listen [::]:80 default_server;
    
    

• 重启nginx服务

 systemctl restart nginx.service