在Ubuntu 13.10 中安装配置 Hadoop 2.3.X

本文详细介绍了如何在Linux环境下安装并配置Hadoop集群，包括安装JDK、创建Hadoop组和用户、SSH服务器安装、生成SSH证书、下载并安装Hadoop版本、设置环境变量等关键步骤。

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预备条件：

1. 已安装JDK

Add Hadoop Group and User

$ sudo addgroup hadoop
$ sudo adduser --ingroup hadoop hduser
$ sudo adduser hduser sudo

切换到hduser账户下操作

SSH-server 安装

$ sudo apt-get install openssh-server

Setup SSH Certificate

$ ssh-keygen -t rsa -P ''

...
Your identification has been saved in /home/hduser/.ssh/id_rsa.

Your public key has been saved in /home/hduser/.ssh/id_rsa.pub.

...
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

$ ssh localhost

Hadoop安装
Download Hadoop 2.2.0

$ cd ~
$ wget http://www.trieuvan.com/apache/hadoop/common/hadoop-2.2.0/hadoop-2.2.0.tar.gz

$ sudo tar vxzf hadoop- 2.2 . 0 .tar.gz -C /usr/local

$ cd /usr/local

$ sudo mv hadoop- 2.2 . 0 hadoop

$ sudo chown -R hduser:hadoop hadoop

Setup Hadoop Environment Variables

$cd ~
$sudo gedit .bashrc

paste following to the end of the file

#Hadoop variables
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_45
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
###end of paste