- HOW TO INSTALL APACHE SPARK ON CENTOS 7 HOW TO
- HOW TO INSTALL APACHE SPARK ON CENTOS 7 UPDATE
- HOW TO INSTALL APACHE SPARK ON CENTOS 7 SOFTWARE
- HOW TO INSTALL APACHE SPARK ON CENTOS 7 PASSWORD
Step 6 – Configure Hadoopįirst, you will need to create the namenode and datanode directories inside Hadoop home directory: Save and close the file when you are finished.
HOW TO INSTALL APACHE SPARK ON CENTOS 7 UPDATE
Update the JAVA_HOME variable as per your Java installation path: export JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.8_1.x86_64/ Next, open the Hadoop environment variable file: nano $HADOOP_HOME/etc/hadoop/hadoop-env.sh Then, activate the environment variables with the following command: source ~/.bashrc Open the ~/.bashrc file in your favorite text editor: nano ~/.bashrcĪppend the following lines: export JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.8_1.x86_64/Įxport HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/nativeĮxport PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/binĮxport HADOOP_OPTS="=$HADOOP_HOME/lib/native" Next, you will need to configure Hadoop and Java Environment Variables on your system. Next, rename the extracted directory to hadoop: mv hadoop-3.2.1 hadoop Once downloaded, extract the downloaded file: tar -xvzf hadoop-3.2.1.tar.gz Next, download the latest version of Hadoop using the wget command: wget Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.Īctivate the web console with: systemctl enable -now cockpit.socket Type yes and hit Enter to authenticate the localhost: The authenticity of host 'localhost (::1)' can't be established.ĮCDSA key fingerprint is SHA256:0YR1kDGu44AKg43PHn2gEnUzSvRjBBPjAT3Bwrdr3mw.Īre you sure you want to continue connecting (yes/no)? yes You will be asked to authenticate hosts by adding RSA keys to known hosts.
Next, verify the passwordless SSH authentication with the following command: ssh localhost Next, append the generated public keys from id_rsa.pub to authorized_keys and set proper permission: cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys SHA256:a/og+N3cNBssyE1ulKK95gys0POOC0dvj+Yh1dfZpf8 Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub. Your identification has been saved in /home/hadoop/.ssh/id_rsa. Just press Enter to complete the process: Generating public/private rsa key pair.Įnter file in which to save the key (/home/hadoop/.ssh/id_rsa):Įnter passphrase (empty for no passphrase): Next, run the following command to generate Public and Private Key Pairs: ssh-keygen -t rsa Next, you will need to configure passwordless SSH authentication for the local system.įirst, change the user to hadoop with the following command: su - hadoop Step 4 – Configure SSH Key-based Authentication Passwd: all authentication tokens updated successfully.
HOW TO INSTALL APACHE SPARK ON CENTOS 7 PASSWORD
Provide and confirm the new password as shown below: Changing password for user hadoop. Next, set the password for this user with the following command: passwd hadoop Run the following command to create a new user with name hadoop: useradd hadoop It is a good idea to create a separate user to run Hadoop for security reasons. OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode) OpenJDK Runtime Environment (build 1.8.0_232-b09) You should get the following output: openjdk version "1.8.0_232" Once installed, verify the installed version of Java with the following command: java -version You can install OpenJDK 8 and ant using DNF command as shown below: dnf install java-1.8.0-openjdk ant -y Hadoop is written in Java and supports only Java version 8. Next, restart your system to apply the SELinux changes. To disable SELinux, open the /etc/selinux/config file: nano /etc/selinux/configĬhange the following line: SELINUX=disabled Step 1 – Disable SELinuxīefore starting, it is a good idea to disable the SELinux in your system.
HOW TO INSTALL APACHE SPARK ON CENTOS 7 HOW TO
In this guide, we will explain how to install Apache Hadoop on RHEL/CentOS 8. It has four major components such as Hadoop Common, HDFS, YARN, and MapReduce. It is an ecosystem of Big Data tools that are primarily used for data mining and machine learning. It uses HDFS to store its data and process these data using MapReduce.
HOW TO INSTALL APACHE SPARK ON CENTOS 7 SOFTWARE
Hadoop is a free, open-source and Java-based software framework used for storage and processing of large datasets on clusters of machines.
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