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- JAVA 1.7.0. VIRTUAL MACHINE FOR FREE
- JAVA 1.7.0. VIRTUAL MACHINE INSTALL
- JAVA 1.7.0. VIRTUAL MACHINE UPDATE
- JAVA 1.7.0. VIRTUAL MACHINE PASSWORD
- JAVA 1.7.0. VIRTUAL MACHINE DOWNLOAD
STARTUP_MSG: host = localhost.localdomain/127.0.0.1 Step 4: Name node format ~]$ hdfs namenode -formatġ4/06/20 21:19:34 INFO namenode.NameNode: STARTUP_MSG:
JAVA 1.7.0. VIRTUAL MACHINE UPDATE
Running Hadoop in Pseudo-Distributed mode Step 1: Update core-site.xmlĪdd the following to core-site.xml ~]$ vi $HADOOP_HOME/etc/hadoop/core-site.xmlĪdd the following to hdfs-site.xml ~]$ vi $HADOOP_HOME/etc/hadoop/hdfs-site.xmlĪdd the following to mapred-site.xml ~]$ vi $HADOOP_HOME/etc/hadoop/mapred-site.xmlĪdd the following to yarn-site.xml ~]$ vi $HADOOP_HOME/etc/hadoop/yarn-site.xml Start all Components Desktop]$ Desktop]$ jps
JAVA 1.7.0. VIRTUAL MACHINE PASSWORD
Verify that doing SSH does not prompt for password ~]$ ssh localhost Your identification has been saved in /home/hadoop/.ssh/id_dsa. Tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 8662/sshdĬreate empty phrase SSH keys so that you don’t have to enter password manually, while hadoop works ~]$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa Make sure port 22 is Downloads]# netstat -tulpn | grep :22
JAVA 1.7.0. VIRTUAL MACHINE INSTALL
Solution Install SSH server/client Downloads]$ yum -y install openssh-server openssh-clientsĮnable SSH Downloads] chkconfig sshd Downloads] service sshd start Ssh: connect to host localhost port 22: Connection refused
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VM: ssh: Could not resolve hostname VM: Name or service not known If you are getting SSH related issues while starting dfs (name node,data node or yarn), it could be that SSH is not installed or running. This command was run using /usr/share/hadoop/2.2.0/share/hadoop/common/hadoop-common-2.2.0.jar Step 7: Test Hadoop Downloads]$ hadoop versionįrom source with checksum 79e53ce7994d1628b240f09af91e1af4
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Things are all easy in Downloads]$ source ~]$ vi /usr/share/hadoop/2.2.0/etc/hadoop/hadoop-env.shĮxport JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.55.x86_64Įxport HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/nativeĮxport HADOOP_OPTS="=$HADOOP_HOME/lib" PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin Step 6: Update Environment Variables ~]$ vi ~/.bash_profile Step 5: Change Ownership Downloads]# cd share]# chown -R hadoop share]# chgrp -R hadoop hadoop
JAVA 1.7.0. VIRTUAL MACHINE DOWNLOAD
Step 4: Download Hadoop ~]$ su Downloads]$ wget Downloads]$ tar -xvf hadoop-2.2.0.tar.gzįor now we can place hadoop under /usr/share/hadoop folder Downloads]# mkdir Downloads]# mv hadoop-2.2.0 /usr/share/hadoop/2.2.0 Passwd: all authentication tokens updated ~]# Setup Hadoop Step 3: Create new user to run hadoop ~]# useradd ~]# passwd hadoop
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1 root root 29 Jun 20 10:29 jre-openjdk -> /etc/alternatives/jre_openjdk 1 root root 21 Jun 20 10:29 jre -> /etc/alternatives/jre 1 root root 34 Jun 20 10:29 java-openjdk -> /etc/alternatives/java_sdk_openjdk 1 root root 26 Jun 20 10:29 java -> /etc/alternatives/java_sdk In CentOS6, JDK gets installed under the following folder java-1.7.0-openjdk-1.7.0.55.x86_64]# ll /usr/lib/jvm In windows it is one click install process tom]# yum install tom]# javac -version Step 2: Install JDK tom]# yum search java | grep -i -color 'JDK' Setup Java Step 1: Make sure CentOS system is fully up-to-dateīecome super user and run yum update ~]$ tom]# yum update Successful login would show the desktop screen You may have to help VM Player, when prompted hit “I copied it” Select the one you have already extracted You can even download Cloudera Quick Start VM, tailored for big data needs.Īfter downloading, extract it to a suitable place in your host OS. You can download legal CentOs6 image from here.
JAVA 1.7.0. VIRTUAL MACHINE FOR FREE
You can download VM Player for free from here. Setup Virtual Machine Step 1: Download Virtual Machine Player If you don’t want to have dedicated hardware for quick setup and research, a virtual machine would be the right choice.