[root@node1 hadoop]# scp -r /usr/local/jdk node2://usr/local/
[root@node1 hadoop]# scp -r /usr/local/jdk node3://usr/local/
[root@node1 hadoop]# scp -r /usr/local/hadoop node2://usr/local/
[root@node1 hadoop]# scp -r /usr/local/hadoop node3://usr/local/
[root@node1 hadoop]# scp /etc/profile node2://etc/
[root@node1 hadoop]# scp /etc/profile node3://etc/
3台主机，分别执行
source /etc/profile
验证hadoop 格式化
[root@node1 hadoop]# hadoop namenode -format
[root@node1 hadoop]# start-all.sh
jps查看进程
浏览器访问
http://node1:50070 http://node1:50070/dfshealth.html#tab-overview
