Test

hadoop單機版

https://www.jianshu.com/p/1352ce8c8d73 (Tested)
在hosts文件中進行主機的註冊 什麼也不配，所以配置什麼也不改變，是單機模式。

下載

wget http://apache.fayea.com/hadoop/common/hadoop-2.8.0/hadoop-2.8.0.tar.gz
解壓縮：tar xzvf hadoop-2.8.0.tar.gz -C /usr/local/

修改配置

vi /etc/profile
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
vim /usr/local/hadoop/etc/hadoop/hadoop-env.sh
export JAVA_HOME=/usr/local/jdk #具體看每臺機器安裝的jdk的位置

測試

rm -rf /tmp/out; hadoop jar ${HADOOP_HOME}/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.5.jar wordcount ~/install/word_test /tmp/out/

edf

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THis is main()
{
}