安装并检查Java环境

JKD下载

https://download.csdn.net/download/qq_36698956/10731785

安装JDK

cd /usr/local
mkdir java
cd ./java
//上传文件
unzip jdk-8u121-linux-x64.zip

设置JAVA_HOME

    vi /etc/profile
    export JAVA_HOME = /usr/local/java/jdk1.8.0_121
    export PATH = $JAVA_HOME/bin:$PATH
    export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
　source /etc/profile

设置目录权限

chmod -R 744 /usr/local/java

安装Hadoop

下载、解压、安装

# cd /usr/local
# wget http://labfile.oss.aliyuncs.com/hadoop-2.6.0.tar.gz
# tar xzf hadoop-2.7.1.tar.gz
# mv hadoop-2.7.1 /usr/local/hadoop
# chmod 774 /usr/local/hadoop

配置环境变量

vi ~/.bashrc

 #HADOOP VARIABLES START
     export JAVA_HOME=/usr/local/java/jdk1.8.0_121
     export HADOOP_INSTALL=/usr/local/hadoop
     export PATH=$PATH:$HADOOP_INSTALL/bin
     export PATH=$PATH:$HADOOP_INSTALL/sbin
     export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
     export HADOOP_COMMON_HOME=$HADOOP_INSTALL
     export HADOOP_HDFS_HOME=$HADOOP_INSTALL
     export YARN_HOME=$HADOOP_INSTALL
     export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
     export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"
 #HADOOP VARIABLES END

source ~/.bashrc

vi /usr/local/hadoop/etc/hadoop/hadoop-env.sh

export JAVA_HOME=/usr/local/java/jdk1.8.0_121

检查安装

hadoop version

Hadoop 2.6.0
Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r e3496499ecb8d220fba99dc5ed4c99c8f9e33bb1
Compiled by jenkins on 2014-11-13T21:10Z
Compiled with protoc 2.5.0
From source with checksum 18e43357c8f927c0695f1e9522859d6a
This command was run using /usr/local/hadoop/share/hadoop/common/hadoop-common-2.6.0.jar