How to Install HDFS on Elementary OS Latest

Hadoop Distributed File System (HDFS) is a distributed file system designed to run on commodity hardware. It is part of the Apache Hadoop project and is used by many big data applications as a primary storage layer. In this tutorial, you will learn how to install HDFS, which is available from http://hadoop.apache.org/, on Elementary OS Latest.

Prerequisites:

• Elementary OS Latest installed.
• Java 8 or higher installed.
• A user account with sudo privileges.

Steps:

1. Open Terminal and update the package list:

   sudo apt update
   

2. Install SSH client:

   sudo apt install ssh
   

3. Download the Hadoop installation file:

   wget https://downloads.apache.org/hadoop/common/hadoop-3.3.1/hadoop-3.3.1.tar.gz
   

4. Extract the downloaded file:

   tar -xvf hadoop-3.3.1.tar.gz
   

5. Move the extracted folder to /usr/local/ directory:

   sudo mv hadoop-3.3.1 /usr/local/hadoop
   

6. Set the JAVA_HOME environment variable:

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

7. Append the following lines to the end of the ~/.bashrc file:

   export HADOOP_HOME=/usr/local/hadoop
   export PATH=$PATH:$HADOOP_HOME/bin
   

8. Reload the ~/.bashrc file:

   source ~/.bashrc
   

9. Edit the hadoop-env.sh file:

   sudo nano /usr/local/hadoop/etc/hadoop/hadoop-env.sh
   

10. Find the line that starts with export JAVA_HOME and update it with the following path:

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

11. Save and Close the file.

12. Edit the core-site.xml file:

sudo nano /usr/local/hadoop/etc/hadoop/core-site.xml

13. Add the following configuration to the file:

<configuration>
    <property>
      <name>fs.defaultFS</name>
      <value>hdfs://localhost:9000</value>
    </property>
</configuration>

14. Save and Close the file.

15. Edit the hdfs-site.xml file:

sudo nano /usr/local/hadoop/etc/hadoop/hdfs-site.xml

16. Add the following configuration to the file:

<configuration>
   <property>
      <name>dfs.replication</name>
      <value>1</value>
   </property>
   <property>
      <name>dfs.namenode.name.dir</name>
      <value>/usr/local/hadoop/hadoop_data/hdfs/namenode</value>
   </property>
   <property>
      <name>dfs.datanode.data.dir</name>
      <value>/usr/local/hadoop/hadoop_data/hdfs/datanode</value>
   </property>
</configuration>

17. Save and Close the file.

18. Format the HDFS file system:

hdfs namenode -format

19. Start the HDFS service:

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

20. Verify the HDFS installation:

hdfs dfs -ls /

This will show you the contents of the root directory in the HDFS file system.

Congratulations! You have successfully installed and verified HDFS on Elementary OS Latest. Now you can use HDFS to store and process big data on your system.