install hadoop on xubuntu

0. install xubuntu

we recommend to set username as "hadoop"

after installation, set user "hadoop" as administrator

sudo addgroup hadoop
sudo adduser --ingroup hadoop hadoop 

打开/etc/sudoers文件

sudo gedit /etc/sudoers

在root  ALL=(ALL:ALL)  ALL下添加hadoop  ALL=(ALL:ALL)  ALL

1. install java

.解压java压缩包到usr/java(新建的文件夹)中。解压后就可使用

.配置环境变量。如下
在etc/profile 文件中。在最后添加如下内容
#set java environment
export JAVA_HOME=/usr/java/jdk1..0_67
export JRE_HOME=/usr/java/jdk1..0_67/jre
export PATH=$PATH:/usr/java/jdk1..0_67/bin
export CLASSPATH=./:/usr/java/jdk1..0_67/lib:/usr/java/jdk1..0_67/jre/lib    

.配置立即生效命令
  source /etc/profile  

.检测是否配置成功
  java -version  

如果不行，重启linux  

2. configure login in ssh without entering password

please operate under user "hadoop"

su - hadoop
sudo apt-get install openssh-server 
sudo /etc/init.d/ssh start  

cd ~/.ssh
ssh-keygen -t rsa -P ""  
cat ~/.ssh/id_rsa.pub>> ~/.ssh/authorized_keys  

3. install hadoop

. unzip hadoop.tar.gz into /usr/hadoop
　　then, ensure user "hadoop" owns /usr/hadoop
　　
sudo chown -R hadoop:hadoop hadoop  

. edit environment
    2.1 gedit /etc/profile    append these: 

export JAVA_HOME=/usr/java/
export JRE_HOME=/usr/java/jre
export HADOOP_INSTALL=/usr/hadoop
export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_INSTALL/bin:$HADOOP_INSTALL/sbin
export CLASSPATH=./:/usr/java/lib:/usr/java/jre/lib

    2.2 gedit /usr/hadoop/conf/hadoop-env.sh    append these:

# The java implementation to use.  Required.
export JAVA_HOME=/usr/java
export HADOOP_INSTALL=/usr/hadoop
export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_INSTALL/bin:$HADOOP_INSTALL/sbin

. restart linux

4. test

hadoop@ms:~$
hadoop@ms:~$ java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) -Bit Server VM (build 24.79-b02, mixed mode)
hadoop@ms:~$ hadoop version
Hadoop 1.2.
Subversion https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r 1503152
Compiled by mattf on Mon Jul  :: PDT
From source with checksum 6923c86528809c4e7e6f493b6b413a9a
This command was run using /usr/hadoop/hadoop-core-1.2..jar
hadoop@ms:~$ 

5. hadoop 伪分布式

编辑三个文件：
). core-site.xml:

<configuration>
    <property>
        <name>fs.default.name</name>
        <value>hdfs://localhost:9000</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/usr/local/hadoop/tmp</value>
    </property>
</configuration>  

).hdfs-site.xml:

<configuration>
    <property>
        <name>dfs.replication</name>
        <value></value>
    </property>
    <property>
        <name>dfs.name.dir</name>
        <value>/usr/local/hadoop/datalog1,/usr/local/hadoop/datalog2</value>
    </property>
    <property>
        <name>dfs.data.dir</name>
        <value>/usr/local/hadoop/data1,/usr/local/hadoop/data2</value>
    </property>
</configuration>  

). mapred-site.xml:

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

. 启动Hadoop到相关服务，格式化namenode, secondarynamenode, tasktracker:
hadoop@derekUbun:/usr/local/hadoop$ source /usr/local/hadoop/conf/hadoop-env.sh
hadoop@derekUbun:/usr/local/hadoop$ hadoop namenode -format  

6*. install hbase[伪分布式]

. unzip hbase.tar.gz into /usr/hbase
　　then, ensure user "hadoop" owns /usr/hbase
　　
sudo chown -R hadoop:hadoop hbase  

. edit environment
    2.1 gedit /etc/profile    append these: 

export HBASE_HOME="/usr/hbase"
export PATH=$HBASE_HOME/bin:$PATH

    2.2 gedit /usr/hbase/conf/hbase-site.xml    append these:

<property>
     <name>hbase.rootdir</name>
     <!-- 对应hadoop中hdfs的配置项 -->
     <value>hdfs://localhost:9000/hbase</value>
 </property>
 <property>
     <name>hbase.cluster.distributed</name>
     <value>true</value>
</property>
<property>
     <name>hbase.master.info.port</name>
     <value></value>
</property>

    2.3 gedit /usr/hbase/hbase-env.sh    modify these:

# The java implementation to use.  Java 1.6 required.
export JAVA_HOME=/usr/java/

# Extra Java CLASSPATH elements.  Optional.
export HBASE_CLASSPATH=/usr/hadoop/conf

# Tell HBase whether it should manage it's own instance of Zookeeper or not.
export HBASE_MANAGES_ZK=true

. restart linux
    

#. references

http://blog.csdn.net/zhaoyl03/article/details/8657104#

http://www.tuicool.com/articles/VZn6zi

http://blog.csdn.net/zhaoyl03/article/details/8657104#

http://blog.csdn.net/pdw2009/article/details/21261417

http://www.th7.cn/db/nosql/201510/134214.shtml