1）啓動名稱節點
Hadoop-daemon.sh start namenode
2) 啓動數據節點
hadoop-daemons.sh start datanode slave
3）hadoop-daemon.sh start secondarynamenode
4）查看端口50070
netstat -anop | grep 500
5）開啓resourcemanager
yarn-daemon.sh start resourcemanager
6）開啓nodemanager
bin/yarn-daemons.sh start nodemanager
停止一個數據節點
hadoop-daemon.sh stop datanode
重新開啓
hadoop-daemon.sh start datanode
