大家好,又见面了,我是全栈君。
在hadoop1.2.1被预装在一份报告中安装说明java。我装了很多的版本号java以及许多的版本号hadoop,然后发现oracle-java7与hadoop1.2.1能够匹配。
一,安装详细过程例如以下:
1. 安装java: sudo apt-get install oracle-java7-installer
2. 安装hadoop1.2.1: http://hadoop.apache.org/docs/r1.2.1/single_node_setup.html#Download
二。測试是否成功安装(伪分布式模式):
Format a new distributed-filesystem: $ bin/hadoop namenode -format
Start the hadoop daemons: $ bin/start-all.sh
The hadoop daemon log output is written to the ${HADOOP_LOG_DIR} directory (defaults to ${HADOOP_HOME}/logs). Browse the web interface for the NameNode and the JobTracker; by default they are available at: NameNode – http://localhost:50070/ JobTracker – http://localhost:50030/ Copy the input files into the distributed filesystem: $ bin/hadoop fs -put conf input
Run some of the examples provided: $ bin/hadoop jar hadoop-examples-*.jar grep input output ‘dfs[a-z.] ’
Examine the output files: Copy the output files from the distributed filesystem to the local filesytem and examine them: $ bin/hadoop fs -get output output $ cat output/*
When you’re done, stop the daemons with: $ bin/stop-all.sh
三。web UI
1. NameNode:http://localhost:50070/ 2. JobTracker :http://localhost:50030/
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