配置nginx的systemctl管理方式

1. 创建nginx.service文件
在/etc/systemd/system/目录下，创建一个名为nginx.service的文件，具体命令如下：

sudo nano /etc/systemd/system/nginx.service

2. 编辑nginx.service文件
将以下内容复制到nginx.service文件中：

[Unit]
Description=The NGINX HTTP and reverse proxy server
After=network.target remote-fs.target nss-lookup.target

[Service]
Type=forking
PIDFile=/run/nginx.pid
ExecStartPre=/usr/sbin/nginx -t
ExecStart=/usr/sbin/nginx
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s TERM $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target

3. 重新加载systemctl配置文件
在终端中输入以下命令，重新加载systemctl配置文件：

sudo systemctl daemon-reload

4. 设置nginx开机自动启动
在终端中输入以下命令，设置nginx开机自动启动：

sudo systemctl enable nginx

5. 启动nginx
在终端中输入以下命令，启动nginx：

sudo systemctl start nginx

6. 检查nginx状态
在终端中输入以下命令，检查nginx状态：

sudo systemctl status nginx

如果nginx正在运行，输出结果应该类似以下内容：

● nginx.service - The NGINX HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2019-10-22 07:48:36 UTC; 2s ago
  Process: 1099 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
 Main PID: 1100 (nginx)
   CGroup: /system.slice/nginx.service
           ├─1100 nginx: master process /usr/sbin/nginx
           └─1101 nginx: worker process

Oct 22 07:48:36 myserver systemd[1]: Starting The NGINX HTTP and reverse proxy server...
Oct 22 07:48:36 myserver nginx[1099]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Oct 22 07:48:36 myserver nginx[1099]: nginx: configuration file /etc/nginx/nginx.conf test is successful
Oct 22 07:48:36 myserver systemd[1]: Started The NGINX HTTP and reverse proxy server.