1. Change to the root user or use sudo.
2. Create a text file called maprtech.repo in the /etc/yum.repos.d/ directory with the following content, replacing v4.0.2 with the version of MapR that you want to install:

   [maprtech] name=MapR Technologies baseurl=http://package.mapr.com/releases/v4.0.2/redhat/ enabled=1 gpgcheck=0 protect=1 [maprecosystem] name=MapR Technologies baseurl=http://package.mapr.com/releases/ecosystem-5.x/redhat enabled=1 gpgcheck=0 protect=1

    

3. To install the MapR package key, issue the command appropriate for your Linux distribution:
   CentOS/RedHat

   rpm --import http://package.mapr.com/releases/pub/maprgpg.key

    

4. To enable the EPEL repository on CentOS or Red Hat 6.x:

   1. Download the EPEL repository:

      wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

   2. Install the EPEL repository:

      rpm -Uvh epel-release-6*.rpm

       

5. Upgrade yum:

   sudo yum upgrade ca-certificates --disablerepo=epel

6. Setting Up the Installation Machine

   Complete the following steps to set up the installation machine:

   1. Download the mapr-setup file for the MapR version that you plan to install. The following examples use the wget utility to download mapr-setup for MapR version 4.0.2, however you can also download mapr-setup for MapR v4.0.1.
      Ubuntu

      wget http://package.mapr.com/releases/v4.0.2/ubuntu/mapr-setup

      RedHat/CentOS

      wget http://package.mapr.com/releases/v4.0.2/redhat/mapr-setup

      SuSE

      wget http://package.mapr.com/releases/v4.0.2/suse/mapr-setup

   2. Navigate to the directory where you downloaded mapr-setup, and enable execute permissions with the following command:

      chmod 755 mapr-setup

   3. Run mapr-setup to unpack the installer files to the /opt/mapr-installer directory. The user running mapr-setup must have write access to the /opt and /tmp directories. You can execute mapr-setup with sudo privileges:

      sudo ./mapr-setup

      The system extracts the installer and copies the set up files to /opt/mapr-install.  The system prompts you to run /opt/mapr-installer/bin/install to begin the installation process. Follow the guidelines in the Using the MapR Quick Installer section.

7. CentOS/RedHat

   /opt/mapr-installer/bin/install new

    

8. Install MapR Service Packages

   Install services based on your cluster plan and service layout. Depending on your plan, you may have decided to run your cluster in one of the following modes:

   • MapReduce Classic (MapReduce1)
   • YARN (MapReduce2)
   • Mixed-Mode (MapReduce1 and MapReduce2)

   For more information about the various modes, see Planning the Cluster, MapReduce Version 1, and YARN.

   List of Packages by Mode

   The following table lists the MapR packages to install on cluster nodes based on the MapReduce mode that you plan to run:

   Installation	MapReduce Classic	YARN	Mixed-Mode
   Packages to install on all cluster nodes	mapr-fileserver	mapr-fileserver	mapr-fileserver
   Packages to install on designated cluster nodes	mapr-cldb mapr-zookeeper mapr-nfs mapr-webserver mapr-metrics mapr-gateway mapr-jobtracker mapr-tasktracker	mapr-cldb mapr-zookeeper mapr-nfs mapr-webserver mapr-gateway mapr-resourcemanager mapr-nodemanager mapr-historyserver	mapr-cldb mapr-zookeeper mapr-nfs mapr-webserver mapr-metrics mapr-gateway mapr-jobtracker mapr-tasktracker mapr-resourcemanager mapr-nodemanager mapr-historyserver
   Package to install on client machines that run hadoop commands	mapr-client	mapr-client	mapr-client

   Icon

   This table is a rough guide and does not include the additional packages required for internal dependencies or Hadoop ecosystemcomponents. Install the packages based on a thorough plan. As a best practice, do not install mapr-tasktracker or mapr-nodemanager on nodes with CLDB and/or ZooKeeper installed.

   To install MapR, select one of the following installation methods:

    Installing from a Repository

    Installing from a repository on RedHat or CentOS

   Change to the root user or use sudo, and issue the yum command to install the services that you want to run on the node.

   Syntax

   yum install <package_name> <package_name> <package_name>

   Example

   yum install mapr-fileserver mapr-tasktracker

REF:

http://doc.mapr.com/display/MapR40x/Quick+Installation+Guide

http://doc.mapr.com/display/MapR40x/Quick+Installation+Guide#QuickInstallationGuide-prepare

http://doc.mapr.com/display/MapR/Installing+MapR+Software#InstallingMapRSoftware-UsingMapR%27sInternetrepository

http://serverfault.com/questions/637549/epel-repo-for-centos-6-causing-error