Linux下yum安装Nginx

1、Centos6系统库中默认是没有nginx的rpn包的，所以我们需要先更新下rpm依赖库
 (1)：使用yum安装nginx，安装nginx库

rpm -Uvh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
 (2)：使用下面命令安装nginx

yum -y install nginx
 (3)：启动nginx

service nginx start #centos6
或
systemctl start nginx.service #centos7
 (4)：防火墙允许通过80端口

vim /etc/sysconfig/iptables

# Generated by iptables-save v1.4.7 on Thu Dec 28 19:47:19 2017
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [21691:949300]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
 (5)：重启防火墙
service iptables restart
 (6)：访问 localhost:80