hadoop一些入门命令（笔记）

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<span style="font-family:Helvetica Neue;">先连接以及搭好hadoop环境的系统（ubuntu）</span>

<span style="font-family: "Helvetica Neue";">yuukoiryPro:~ yuukoiry$ ssh hadoop@(ip)</span>

hadoop@master:~$ cd /etchadoop@master:/etc$ sudo vi hostshadoop@master:/etc$ sudo cat hosts

清除之前的记录、格式化并重新启动hadoop@master:/etc$ cd /mysoftware/hadoop-2.6.0/hadoop@master:/mysoftware/hadoop-2.6.0$ rm -rf tmphadoop@master:/mysoftware/hadoop-2.6.0$ rm -rf logshadoop@master:/mysoftware/hadoop-2.6.0$ rm -rf dfshadoop@master:/mysoftware/hadoop-2.6.0$ bin/hdfs namenode -formathadoop@master:/mysoftware/hadoop-2.6.0$ sbin/start-dfs.shhadoop@master:/mysoftware/hadoop-2.6.0$ sbin/start-yarn.shhadoop@master:/mysoftware/hadoop-2.6.0$ jpshadoop@master:/mysoftware/hadoop-2.6.0$ cd ~hadoop@master:~$ mkdir texthadoop@master:~$ cd text/hadoop@master:~/text$ echo "Hello hadoop" >> text01.txthadoop@master:~/text$ echo "Hello hdfs hello mapreduce" >> text02.txthadoop@master:~/text$ lshadoop@master:~/text$ cat *hadoop@master:~/text$ cd /mysoftware/hadoop-2.6.0/hadoop@master:/mysoftware/hadoop-2.6.0$ bin/hdfs dfs -mkdir /inputhadoop@master:/mysoftware/hadoop-2.6.0$ bin/hdfs dfs -put ~/text/* /inputbin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar wordcount /input /output

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