[root@centos7 conf.d]# nginx -s reopen
nginx: [warn] conflicting server name "localhost" on 0.0.0.0:80, ignored
nginx: [error] invalid PID number "" in "/var/run/nginx.pid"

Set the loaded configuration file to:

[root@centos7 conf.d]# nginx -c /etc/nginx/nginx.conf
[root@centos7 conf.d]# nginx -s reload
[root@centos7 conf.d]# nginx -v
nginx version: nginx/1.18.0
[root@centos7 conf.d]# nginx -s reopen
[root@centos7 conf.d]#

Read More:

• Nginx error: nginx: [error] invalid PID number “” in “/run/nginx.pid”
• nginx: [error] invalid PID number ““ in “/data/nginx/logs/nginx.pid“
• Nginx startup error: nginx: [error] open() “/ var / run / nginx/ nginx.pid The solution of “failed (2: no such file or directory)”
• CentOS7 nginx Failed to read PID from file /run/nginx.pid: Invalid argument？
• nginx: [error] open() "/var/run/nginx/nginx.pid" failed (2: No such file or directory)
• /var/run/nginx/nginx.pid” failed (2: No such file or directory)
• nginx: open() “/var/run/nginx.pid“ failed (2: No such file or directory)
• nginx: [error] open() “/usr/local/var/run/nginx.pid” failed (2: No such file or directory)
• nginx: [error] open() “/run/nginx.pid” failed (2: No such file or directory)
• nginx: [error] open() “/usr/local/nginx/logs/nginx.pid“ failed (2: No such file or directory)
• Solve the problem of starting nginx nginx.pid error
• Plug in loaded: fastmirror, langpacks / var / run/ yum.pid Locked, another program with PID 2323 is running
• socket.error : [errno 10048] and view PID process number and port number
• Nginx start error: job for nginx.service failed because the control process exited with error code
• Nginx installation in MAC
• nginx: [warn] conflicting server name “www.yqq.org“ on 0.0.0.0:80, ignored
• nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
• The garbled problem of hot deployment in nginx
• Implementation of HTTPS file server based on nginx in win2012
• Resolve nginx startup failure