Ubuntu Hadoop3.3.1 伪分布式安装 草稿

一、

cd /usr/local/hadoop/etc/hadoop/
vim core-site.xml 

<configuration>
        <property>
                <name>fs.defaultFS</name>
                <value>hdfs://localhost:9000</value>
        </property>
        <property>
                <name>hadoop.tmp.dir</name>
                <value>file:/usr/local/hadoop/tmp</value>
                <description>Abase for other temporary directories.</description>       
        </property>
</configuration>

vim hdfs-site.xml

<configuration>
      <property>
                <name>dfs.namenode.name.dir</name>
                <value>file:/usr/local/hadoop/tmp/dfs/name</value>
                <description>为了保证元数据的安全一般配置多个不同目录</description>
        </property>

        <property>
                <name>dfs.datanode.data.dir</name>
                <value>file:/usr/local/hadoop/tmp/dfs/data</value>
                <description>datanode 的数据存储目录</description>
        </property>

        <property>
                <name>dfs.replication</name>
                <value>1</value>
                <description>HDFS 的数据块的副本存储个数</description>
        </property>
</configuration>

cd /usr/local/hadoop
./bin/hdfs namenode -format

cd /usr/local/hadoop
./sbin/start-dfs.sh 

---

最下面加

export HADOOP_HOME=/usr/local/hadoop

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native

source ~/.bashrc

本机与localhost的免密码连接

cd ~/.ssh 

cat ./id_rsa.pub >> ./authorized_keys

在文件夹 $HOME/.ssh/ 下创建一个文件 config，命令是这样的：

vim $HOME/.ssh/config

在新建的文件中写入如下语句：

LogLevel=quiet

保存、退出。

export JAVA_LIBRAY_PATH=/usr/local/hadoop/lib/native
export LD_LIBRARY_PATH=$JAVA_LIBRARY_PATH