检查配置：cat /etc/systemd/system/nginx.service
没有的话就创建或编辑配置：vim /etc/systemd/system/nginx.service，注意修改nginx实际配置路径
[Unit]
Description=The NGINX HTTP and reverse proxy server
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
PIDFile=/usr/local/nginx/nginx.pid
ExecStartPre=/usr/local/nginx/sbin/nginx -t
ExecStart=/usr/local/nginx/sbin/nginx
ExecReload=/usr/local/nginx/sbin/nginx -s reload
#ExecReload=/bin/kill -s HUP $MAINPID ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
[Install]
WantedBy=multi-user.target
重新加载 systemd 配置：
sudo systemctl daemon-reload
尝试重新启动 Nginx 服务：
sudo systemctl start nginx.service
检查服务状态：
sudo systemctl status nginx.service
重新加载 Nginx 服务的配置：
sudo systemctl reload nginx
