hadoop单节点启动/停止

1.单节点停止服务
mapred --daemon stop 服务名
2.整体启动hdfs
start-dfs.sh
3.整体启动yarn
start-yarn.sh
4.分别启动hdfs组件
hdfs --daemon start/stop datanode/namenode/secondarynamenode
5.分别启动/停止yarn
yarn --daemon start/stop resourcemanager/nodemanager