日期:2014-05-16  浏览次数:20711 次

在Linux(Ubuntu)上安装Hadoop

??? 1. 安装 SSH

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???hadoop使用ssh进行通信,需要为ssh配置免密码登录

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$ apt-get install ssh
$ ssh-keygen -t rsa -P ” -f ~/.ssh/id_rsa
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
$ ssh localhost

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?? 验证安装成功:

$ ssh -version

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?? 显示结果:

OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007
Bad escape character ‘rsion’.

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?? 验证无密码登录:

$ ssh localhost

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???显示结果:

Linux ubuntu 2.6.31-14-generic
…
Last login: Sun Jun  5 15:40:06 2011 from localhost

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?? 2. 安装JDK

#下载jdk后,先修改权限
chenwq@ubuntu:~/Downloads$ chmod 777 jdk-6u27-linux-x64.bin

#执行
./jdk-6u27-linux-x64.bin

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?? 3. 安装Hadoop

???下载Hadoop最新版本:?? http://hadoop.apache.org/common/releases.html

?? 下载然后解压

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$ tar zxvf hadoop-0.20.0.tar.gz

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?? 4. 创建一个指向Hadoop的安装目录的环境变量:

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chenwq@ubuntu:/$ export HADOOP_INSTALL=/home/chenwq/Downloads/hadoop
chenwq@ubuntu:/$ export PATH=$PATH:$HADOOP_INSTALL/bin

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?? 5. 检查Hadoop的运行

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chenwq@ubuntu:/$ hadoop version
Hadoop 0.21.0
Subversion https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.21 -r 985326
Compiled by tomwhite on Tue Aug 17 01:02:28 EDT 2010
From source with checksum a1aeb15b4854808d152989ba76f90fac

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