启动和关闭Hadoop集命令步骤启动和关闭Hadoop集命令步骤总结：
1. 关闭NodeManager 、ResourceManager和HistoryManager
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh stop resourcemanager
火影之波风龙宇
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh stop nodemanager
缪海梅
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/mr-jobhistory-daemon.sh stop historyserver
陈数图片1. 启动NodeManager 、ResourceManager和HistoryManager
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start resourcemanager
桑平
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start nodemanager
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/mr-jobhistory-daemon.sh start historyserver
1. 删除HDFS上已经存在的输出⽂件
石家庄旅游景点有哪些[atguigu@hadoop101 hadoop-2.7.2]$ bin/hdfs dfs -rm -R /user/atguigu/output
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