nginx服务无法启动。报错：[emerg] 8482#8482: still could not bind()

安装nginx后发现nginx启动不起来：

查看日志报错情况：

tail -1000f /var/log/nginx/error.log

2023/12/04 16:29:50 [notice] 8482#8482: try again to bind() after 500ms
2023/12/04 16:29:50 [emerg] 8482#8482: bind() to 0.0.0.0:80 failed (98: Address already in use)
2023/12/04 16:29:50 [notice] 8482#8482: try again to bind() after 500ms
2023/12/04 16:29:50 [emerg] 8482#8482: still could not bind()

看报错内容应该是服务已经启动，但端口不能用。nginx服务的端口是80，突然想到之前安装过httpd服务，而httpd服务也是用的80端口。查看一下：