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                修改.profile文件,加入hadoop環境變量 ~~~ export HADOOP_HOME=/home/hadoop/hadoop-2.7.2? export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH:$HADOOP_HOME/share/hadoop/common/hadoop-common-2.7.2.jar:$HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.7.2.jar:$HADOOP_HOME/share/hadoop/common/lib/commons-cli-1.2.jar? export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$HADOOP_HOME/sbin:$HADOOP_HOME/bin:$PATH ~~~ 使文件生效。 source .profile 運行hadoop測試工程: 創建input文件夾: mkdir input 進入到hadoop下的目錄: cd hadoop-2.7.2/etc/hadoop 拷貝x cp *.xml /home/hadoop/input/ 找到/home/hadoop/hadoop-2.7.2/share目錄下的樣例mapreduce程序 hadoop jar home/hadoop/hadoop-2.7.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar grep /home/hadoop/input /home/hadoop/output 'you' 進入output目錄 cd output/ ls 查看生成的2個文件 part-r-00000 _SUCCESS 查看part-r-00000內容
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