在Ubuntu上安装hadoop-2.7.7

1.安装open-vm-tools

sudo apt-get install open-vm-tools

2.安装openjdk

sudo apt-get install openjdk-8-jdk

3.安装配置ssh

apt-get install openssh-server

4.在进行了初次登陆后，会在当前家目录用户下有一个.ssh文件夹，进入该文件夹下：cd .ssh

ssh-keygen -t rsa

一路回车c

5.下载hadoop2.7.7 解压缩并改名为hadoop目录，放到/usr/local下(注意权限)

sudo mv ~/hadoop-2.7.7 /usr/local/hadoop

6.修改目录所有者 /usr/local/下的hadoop文件夹

sudo chown -R 当前用户名 /usr/local/hadoop

7.设置环境变量

(1)进入 sudo gedit ~/.bashrc

#~/.bashrc

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

export HADOOP_HOME=/usr/local/hadoop

export PATH=$PATH:$HADOOP_HOME/bin

export PATH=$PATH:$HADOOP_HOME/sbin

export HADOOP_MAPRED_HOME=$HADOOP_HOME

export HADOOP_COMMON_HOME=$HADOOP_HOME

export HADOOP_HDFS_HOME=$HADOOP_HOME

export HADOOP_YARN_HOME=$HADOOP_HOME

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

export JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/native:$JAVA_LIBRARY_PATH

#打包hadoop程序需要的环境变量

export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH

export CLASSPATH=$($HADOOP_HOME/bin/hadoop classpath):$CLASSPATH

#让环境变量生效

source ~/.bashrc

(2) 进入 /usr/local/hadoop/etc/hadoop/hadoop-env.sh

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

(3) 进入 /usr/local/hadoop/etc/hadoop/core-site.xml

<configuration>

<property>

<name>fs.default.name</name>

<value>hdfs://localhost:9000</value>

</property>

</configuration>

(4) 进入 /usr/local/hadoop/etc/hadoop/hdfs-site.xml

<configuration>

<property>

<name>dfs.replication</name>

<value>1</value>

</property>

<property>

<name>dfs.namenode.name.dir</name>

<value>file:/usr/local/hadoop/hadoop_data/hdfs/namenode</value>

</property>

<property>

<name>dfs.datanode.data.dir</name>

<value>file:/usr/local/hadoop/hadoop_data/hdfs/datanode</value>

</property>

</configuration>

(5) 进入 /usr/local/hadoop/etc/hadoop/mapred-site.xml（mapred-site.xml.template重命名）

<configuration>

<property>

<name>mapreduce.framework.name</name>

<value>yarn</value>

</property>

</configuration>

(6) 进入 /usr/local/hadoop/etc/hadoop/yarn-site.xml

<configuration>

<property>

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

</property>

<property>

<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>

<value>org.apache.hadoop.mapred.ShuffleHandler</value>

</property>

</configuration>

8.格式化hdfs文件系统

hdfs namenode -format

9.启动hadoop

start-all.sh 或start-dfs.sh start-yarn.sh

10.浏览器搜索