1、 nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory) 解决： [root@TEST nginx]# sudo nginx -c /etc/nginx/nginx.conf [root@TEST nginx]# nginx -s reload 2、 [root@nginx nginx]# curl http://127.0.0.1:8089 <html> <head><title>502 Bad Gateway</title></head> <body bgcolor="white"> <center><h1>502 Bad Gateway</h1></center> <hr><center>nginx/1.12.2</center> </body> </html> 解决： nginx的端口开了， 远端的防火墙关了就可以 3、 [root@nginx conf.d]# !n nginx -s reload nginx: [alert] kill(2692, 1) failed (3: No such process) 解决; [root@nginx conf.d]# whereis nginx nginx: /etc/nginx /usr/local/sbin/nginx /usr/local/nginx [root@nginx conf.d]# /usr/local/sbin/nginx nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:58016 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:58016 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:58016 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:58016 failed (98: Address already in use) 端口冲突了，修改下端口； 然后杀掉，58016这个进程， 再重启nginx