centos服务器搭建QA-启动nginx时提示端口被占用

启动nginx时报错-提示端口被占用

在centos搭建服务器时遇到systemctl start nginx时提示ob for nginx.service failed

查看httpd占用状态

在使用centos搭建httpd服务环境时先行启动了httpd导致了服务器端口80 被占用如下

[root@centos conf.d]# netstat -apn|grep :80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      10300/httpd

这里可以看出来80端口已经被httpd占用

启动nginx服务

[root@centos]# systemctl start nginx
Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.

此时开启nginx已经提示错误，使用命令来查看该服务的状态

[root@centos]# systemctl status nginx.service 
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Sun 2020-04-19 11:06:44 CST; 10s ago
     Docs: http://nginx.org/en/docs/
  Process: 11066 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)

Apr 19 11:06:41 centos systemd[1]: Starting nginx - high performance web server...
Apr 19 11:06:42 centos nginx[11066]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 19 11:06:42 centos nginx[11066]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 19 11:06:43 centos nginx[11066]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 19 11:06:43 centos nginx[11066]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 19 11:06:44 centos nginx[11066]: nginx: [emerg] still could not bind()
Apr 19 11:06:44 centos systemd[1]: nginx.service: control process exited, code=exited status=1
Apr 19 11:06:44 centos systemd[1]: Failed to start nginx - high performance web server.
Apr 19 11:06:44 centos systemd[1]: Unit nginx.service entered failed state.
Apr 19 11:06:44 centos systemd[1]: nginx.service failed.

以上信息可以看出该服务的端口80被占用所以导致nginx无法启动，此时我们需要将上方的httpd给关闭，然后再次启用nginx

[root@centos conf.d]# service httpd stop 
Redirecting to /bin/systemctl stop httpd.service

启动nginx

[root@centos conf.d]# systemctl restart nginx.service
[root@centos conf.d]# systemctl status nginx.service
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: active (running) since Sun 2020-04-19 11:21:46 CST; 15min ago
     Docs: http://nginx.org/en/docs/
  Process: 13715 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=0/SUCCESS)
 Main PID: 13716 (nginx)

注意，文中的“centos”为类linux的操作系统,需有一定基础的童鞋操作。

总结

之所以出现此类错误，是由于小编手动重启httpd服务，而不是先重启nginx导致

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