推荐Hadoop学习路线：
Map/Reduce->HBase->Zookeeper->Hive->Hadoop2.0->Ambari
Ambari:
1.安装pdsh:
yum install pdsh
2.关闭防火墙：
service iptables stop
3.设置SELinux 成为permissive模式：
setenforce 0
4.Disable PackageKit：
vim /etc/yum/pluginconf.d/refresh-packagekit.conf
将内容改为enabled=0
5.安装epel-release:
wget http://public-repo-1.hortonworks.com/ambari/centos6/1.x/updates/1.2.4.9/ambari.repo
cp ambari.repo /etc/yum.repos.d/ambari.repo
yum install epel-release
6.安装ambari-server：
yum install ambari-server
7.配置和启动ambari:
ambari-server setup
ambari-server start