1.系统（本人使用虚拟机）：VMware-workstation-full-7.1.2-301548

?????????????????????????????????? ubuntu-10.10-desktop-i386?

?? 软件包：?jdk-6u31-linux-i586.bin

?????????????? hadoop-0.20.205.0.tar.gz

2.JDK安装：

?? 1）将jdk-6u31-linux-i586.bin复制到安装目录，比如：/usr/java/

???2）cd /usr/java

?? 3）chmod 777 jdk-6u31-linux-i586.bin

?? 4）./jdk-6u31-linux-i586.bin

???5）设置JAVA_HOME，vi /etc/profile

???6）在profile文件中加入：JAVA_HOME=/usr/java/jdk1.6.0_31

??????? PATH=$JAVA_HOME/bin:$PATH

??????? export JAVA_HOME PATH
???????????
?

???7）保存/etc/profile并退出，source /etc/profile

???8）执行java -version
??????

?3.Hadoop安装

??? 1）将hadoop-0.20.205.0.tar.gz复制到安装目录，比如：/usr

??? 2）cd /usr

??? 3）tar zxf hadoop-0.20.205.0.tar.gz

??? 4）进入hadoop的conf目录

??????????

??? 6）设置HADOOP_INSTALL环境变量，vi /etc/profile

??? 7）在profile中加入：HADOOP_INSTALL=/usr/hadoop-0.20.205.0

??????? PATH=$JAVA_HOME/bin:$HADOOP_INSTALL/bin:$PATH

??????? export JAVA_HOME? HADOOP_INSTALL PATH
???????????

??? 8）保存profile文件并退出，source?/etc/profile

????9）执行hadoop version

?

? 4.配置hadoop伪分布模式

???? 1）修改/config/core-site.xml

???????? <configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost/</value> </property> </configuration>

?

??? 2）修改hdfs-site.xml

?

<configuration> <property> <name>dfs.replication</name> <value>1</value> </property> </configuration>

?

??? 3）修改mapred-site.xml

<configuration> <property> <name>mapred.job.tracker</name> <value>localhost:8021</value> </property> </configuration>

?

??? 4）创建一个基于空口令的SSH密钥，以启动无密码登录

??????? ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

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

??? 5）测试步骤4）是否成功，ssh localhost，如成功则无需键入密码

??? 6）格式化HDFS文件系统，hadoop namenode -format