1、下载hadoop包 wget http://apache.freelamp.com/hadoop/core/stable/hadoop-0.20.2.tar.gz2、tar xvzf hadoop-0.20.2.tar.gz3、安装JDK，从oracle网站上直接下载JDK，地址：http://www.oracle.com/technetwork/java/javase/downloads/index.html4、chmod +x jdk-6u21-linux-i586.bin;./jdk-6u21-linux-i586.bin,当前目录下出现了jdk1.6.0_21目录5、配置java环
