源碼：Hadoop-2.7.4 啓動過程當中執行start-all.sh開始

1. tart-all.sh腳本 有如下重要的幾句shell命令：java #提示start-all.sh已通過時了，被${HADOOP_HOME}/sbin/start-#dfs.sh 以及start-yarn.sh代替 echo "This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh" #執行$HADOOP

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