$ curl http://localhost

<!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>

常见操作命令

1. 查看状态

查看 Nginx 状态（检查是否正在运行）：

sudo systemctl status nginx

如下：

 nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2024-05-11 10:38:03 CST; 4min 2s ago
       Docs: man:nginx(8)
    Process: 1537 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
    Process: 1538 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
   Main PID: 1645 (nginx)
      Tasks: 17 (limit: 9362)
     Memory: 18.0M
     CGroup: /system.slice/nginx.service
             ├─1645 "nginx: master process /usr/sbin/nginx -g daemon on; master_process on;"
             ├─1648 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1649 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1650 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1651 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1652 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1653 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1654 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1655 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1656 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1657 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1658 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1659 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1660 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1661 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             ├─1662 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >
             └─1663 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" >

May 11 10:38:03 d systemd[1]: Starting A high performance web server and a reverse proxy server...

2. 启停 nginx

启动 Nginx

sudo systemctl start nginx

可以状态确认：

$ sudo systemctl status nginx

$ sudo systemctl status nginx
● nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2024-05-11 10:44:40 CST; 11s ago
       Docs: man:nginx(8)
    Process: 3631 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
    Process: 3632 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
   Main PID: 3633 (nginx)
      Tasks: 17 (limit: 9362)
     Memory: 14.1M
     CGroup: /system.slice/nginx.service
     ...

停止 Nginx

sudo systemctl stop nginx

停止后查看状态：

$ sudo systemctl status nginx
○ nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
     Active: inactive (dead) since Sat 2024-05-11 10:43:42 CST; 2s ago
       Docs: man:nginx(8)
    Process: 3396 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited,>
   Main PID: 1645 (code=exited, status=0/SUCCESS)

May 11 10:38:03 d systemd[1]: Starting A high performance web server and a reverse proxy server...
May 11 10:38:03 d systemd[1]: Started A high performance web server and a reverse proxy server.
May 11 10:43:42 d systemd[1]: Stopping A high performance web server and a reverse proxy server...
May 11 10:43:42 d systemd[1]: nginx.service: Deactivated successfully.
May 11 10:43:42 d systemd[1]: Stopped A high performance web server and a reverse proxy server.

重启

个人理解：重启=关闭+启动

sudo systemctl restart nginx

启动时自动运行 nginx

作用：可以让 ngix 是否在机器重启后服务自动运行。

使 Nginx 在启动时自动运行：
```
sudo systemctl enable nginx
```
禁止 Nginx 在启动时自动运行：
```
sudo systemctl disable nginx
```

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