Hadoop+Ubuntu 学习笔记 ——IT 进行时（zhengxianquan AT hotmail.com） 环备一、境准 Hadoop-0.20.1 Ubuntu 9.10 二、安装JDK6 开终执打端，行以下命令： sudo apt-get install sun-java6-jdk 按照提示做就是了。 配置JAVA 环变境量: sudo gedit /etc/environment 在其中添加如下两行： CLASSPATH=.:/usr/lib/jvm/java-6-sun/lib JAVA_HOME=/usr/lib/jvm/java-6-sun 执行命令：sudo gedit /etc/jvm，在最前面加入： /usr/lib/jvm/java-6-sun 三、配置SSH 见方便起，新增hadoop组户的及其同名用： zhengxq@zhengxq-desktop:~$ sudo addgroup hadoop zhengxq@zhengxq-desktop:~$ sudo adduser --ingroup hadoop hadoop 别则请接下来需要做些特的工作（否参考FAQ“xx is not in the sudoers file”）： hadoop@zhengxq-desktop:~$ su root@zhengxq-desktop:/home/hadoop# ls -l /etc/sudoers -r--r----- 1 root root 557 2009-11-10 22:01 /etc/sudoers root@zhengxq-desktop:/home/hadoop# chmod u+w /etc/sudoers root@zhengxq-desktop:/home/hadoop# ls -l /etc/sudoers -rw-r----- 1 root root 557 2009-11-10 22:01 /etc/sudoers root@zhengxq-desktop:/home/hadoop# gedit /etc/sudoers 在root ALL=(ALL) ALL 后面添加：hadoop ALL=(ALL) ALL root@zhengxq-desktop:/home/hadoop# chmod u-w /etc/sudoers root@zhengxq-desktop:/home/hadoop# exit 安装openssh-server： $ sudo apt-get install openssh-server 建立SSH KEY： zhengxq@zhengxq-desktop:~$ su hadoop hadoop@zhengxq-desktop:/home/zhengxq$ ssh-keygen -t rsa -P "" Generating public/private rsa key pair. Enter file in which to save the key (/home/hadoop/.ssh/id_rsa): Created directory '/home/hadoop/.ssh'. Your identification has been saved in /home/hadoop/.ssh/id_rsa. Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub. The key fingerprint is: f4:5f:6a:f4:e5:bf:1d:c8:08:28:1c:88:b4:31:4a:a0 hadoop@zhengxq-desktop …… 启用 SSH KEY： hadoop@zhengxq-desktop:~$ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys hadoop@zhengxq-desktop:~$ sudo /e...
