nginx重启出现没有nginx.pid文件的报错

systemctl stop nginx.service

systemctl start nginx.service

systemctl status nginx.service

重新指定启动之时加载的配置文件，然后再重启。

nginx的配置文件目录是：/usr/local/nginx/conf/nginx.conf

1.启动：/usr/local/nginx/sbin/nginx  -c /usr/local/nginx/conf/nginx.conf

2.重新加载：/usr/local/nginx/sbin/nginx -s reload

lsof -i:80 查看80端口的程序

netstat -atunp