( Hadoop Start HDFS and MapReduce Hadoop@ Master -IS start-all sh JPS check status Hadoop@ Master -Is jps Stop HDFS and MapReduce Hadoop@ Master -IS stop-all shHadoop 49  Start HDFS and MapReduce [hadoop@Master ~]$ start-all.sh  JPS check status： [hadoop@Master ~]$ jps  Stop HDFS and MapReduce [hadoop@Master ~]$ stop-all.sh