nginx: [emerg] still could not bind()

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在CentOS系统启动Nginx时，出现nginx: [emerg] still could not bind()提示，这意味着Nginx监听的8080端口已被占用。解决办法有两个，一是更换端口，二是查看占用端口的进程并关闭。

centos启动Nginx提示nginx: [emerg] still could not bind()

Starting nginx: nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)  
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)  
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)  
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)  
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)  
nginx: [emerg] still could not bind()

这个的意思是说，nginx监听的 8080端口已经被使用了。解决方法有两种，一种是换端口，另一种是查看占用端口的进程，把它关掉。

--查询端口所在的进程号
[root@localhost www]# netstat -ntlp | grep 8080
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      29186/java    

--杀掉进程
[root@localhost www]# kill -9 29186