nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) 原因与解决办法

Nginx是一款轻量级的Web服务器，特点是占有内存少，并发能力强，因而使用比较广泛，今天在一个VPS上重启Nginx时提示错误：

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)

nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)

中文翻译

nginx：[emerg] bind()到0.0.0.0:80失败（98：地址已经在使用中）

nginx：[emerg] bind()到0.0.0.0:443失败（98：地址已经在使用中）

原因

主要原因是：绑定80端口、443端口失败，端口已经在使用中。意思是端口已经存在，被占用了。

解决办法

那么：如何解决Nginx重启时提示“nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)”错误？

首先我们要弄清楚错误的原因是什么？

从上图中的报错，可以很清楚的得到这样一个原因，此错误指的是80端口被程序占用了。那么解决方法就简单了：

1、首先用命令：“lsof -i:80”查看端口被什么程序占用？

lsof -i:80

或

netstat -ntpl

2、关闭单干占用端口，命令：

[root@localhost conf]# pkill -9 nginx

或

kill -9 PID（例如：kill -9 1688）

也可以用：

强制关闭端口的占用，一个简单的命令就解决了。

sudo fuser -k 80/tcp #关闭占用80端口的程序

使用效果示例：

[root@198.162.1.122 ~]# sudo fuser -k 80/tcp
80/tcp:               2010  2019  2020  2021  2022  2023  2024  2028  2029

3、重新启动Nginx。

[root@localhost nginxssl]# ./sbin/nginx

今天我重启nginx的时候同样报错如下：

[root@localhost nginxssl]# ./sbin/nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 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 0.0.0.0:443 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 0.0.0.0:443 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 0.0.0.0:443 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 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] still could not bind()