如果沒有安裝成功：selinux 沒有關閉
vi /etc/sysconfig/selinux
SELINUX=disabled
防火牆是否開啓
關閉防火牆
[root@localhost ~]# /etc/init.d/iptables stop 關閉防火牆
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
[root@localhost ~]# /etc/init.d/iptables status 查看防火牆的狀態
iptables: Firewall is not running.