Starting nginx: nginx: [emerg] bind() to 0.0.0.0:80 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 0.0.0.0:80 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 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] still could not bind()

出现这种问题是端口占用，也就是说当前的80端口被占用
解决方案：
（1）查看端口

sudo netstat -ntlp

一定需要加sudo的，不然看不了所操作的进程id以及进程名称
（2）找到80所对应的端口，杀死这个进程

sudo kill  进程id

执行sudo netstat -ntlp看看80有没有被杀死
（3）启动nginx

sudo nginx

（4）查看是否启动成功：sudo netstat -ntlp
问题解决类