yum安装nginx，并处理端口占用报错

rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

yum install -y nginx

#启动，重启，开机自启nginx
systemctl start nginx
systemctl restart nginx
systemctl enable  nginx

#查看当前所有tcp端口
netstat -ntlp

#若发现服务启动不了，说明80端口被其他占用，nginx端口默认为80端口
#查找nginx.conf文件，80端口已被占用，修改默认端口
find / -name "nginx.conf"
vi /**实际路径/nginx.conf

#修改端口后，重新启动
systemctl restart nginx

#如端口被httpd，占用，也可以修改httpd配置端口

find / -name httpd.conf

vi /etc/httpd/conf/httpd.conf
netstat -ntlp
systemctl restart httpd