hadoop安装

安装java

1. 将java安装在/usr/local中

2. 修改配置文件：

vi /etc/profile

export JAVA_HOME=/usr/local/jdk1.7.0_71

export PATH=$PATH:$JAVA_HOME/bin

export CLASS_PATH=.:$JAVA_HOME/lib

source /etc/profile

3. 手动设置系统默认JDK

alternatives --install /usr/bin/java java usr/local/java/bin/java 2
alternatives --install /usr/bin/javac javac usr/local/java/bin/javac 2
alternatives --install /usr/bin/jar jar usr/local/java/bin/jar 2
alternatives --set java usr/local/java/bin/java
alternatives --set javac usr/local/java/bin/javac
alternatives --set jar usr/local/java/bin/jar

 

安装Hadoop

1. 下载Hadoop

以root用户进入/usr/local

wget http://apache.claz.org/hadoop/common/hadoop-2.7.3/hadoop-2.7.3.tar.gz

2. 加压

tar zxf hadoop-2.7.3.tar.gz

3. 配置环境变量

vi /etc/profile

export HADOOP_HOME=/usr/local/hadoop-2.7.3
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_INSTALL=$HADOOP_HOME