控制台报 502 问题解决
ps -eaf | grep nginx 查看nginx 的端口
pidof nginx
systemctl status nginx 查看 nginx 的运行状态
netstat -anpl | grep nginx
netstat -anpl | grep 443 查看端口
systemctl restart nginx 重启nginx
systemctl status nginx 查看nginx 状态
ps -eaf | grep nginx 查看nginx 四个端口