This post concentrates on installing ODPi components built using Apache BigTop. These steps configure and run the components on a single node.

# Prerequisites:

* Java 7 (e.g. openjdk-7-jre)

# Repo:

ODPi deb and rpm packages can be found on Linaro repositories:

* Debian Jessie - http://repo.linaro.org/ubuntu/linaro-overlay/
* CentOS 7 - http://repo.linaro.org/rpm/linaro-overlay/centos-7/


# Installation :

### On Debian:

Add to repo source list (**not required if you are using the installer from the Reference Platform**):

```shell
echo "deb http://repo.linaro.org/ubuntu/linaro-overlay jessie main" | sudo tee /etc/apt/sources.list.d/linaro-overlay-repo.list
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E13D88F7E3C1D56C
```

Update the source list and install the dependencies:

```shell
sudo apt-get update
sudo apt-get install openssh-server rsync openjdk-7-jre openjdk-7-jdk
sudo apt-get build-dep build-essential
```

Install Hadoop packages:

```shell 
sudo apt-get install -ft jessie bigtop-tomcat bigtop-utils hadoop* spark* hue* zookeeper* hive* hbase* oozie* pig* mahout*
```

### On CentOS:

```shell
sudo wget http://repo.linaro.org/rpm/linaro-overlay/centos-7/linaro-overlay.repo -O /etc/yum.repos.d/linaro-overlay.repo
sudo yum update
sudo yum -y install openssh-server openssh-clients java-1.7.0-openjdk*
sudo yum install -y bigtop-tomcat bigtop-utils hadoop* spark* hue* zookeeper* hive* hbase* oozie* pig* mahout*
```

### Verifying Installation 

Packages would get installed in /usr/lib 

Type hadoop to check if hadoop is installed:

```shell
hadoop
```

And you should see the following:

```shell
linaro@debian:~$ hadoop
Usage: hadoop [--config confdir] COMMAND
       where COMMAND is one of:
  fs                   run a generic filesystem user client
  version              print the version
  jar <jar>            run a jar file
  checknative [-a|-h]  check native hadoop and compression libraries availability
  distcp <srcurl> <desturl> copy file or directories recursively
  archive -archiveName NAME -p <parent path> <src>* <dest> create a hadoop archive
  classpath            prints the class path needed to get the
  credential           interact with credential providers
                       Hadoop jar and the required libraries
  daemonlog            get/set the log level for each daemon
  trace                view and modify Hadoop tracing settings
 or
  CLASSNAME            run the class named CLASSNAME
```
     
    Most commands print help when invoked w/o parameters.

Next Step: [Setup, Configuration and Running Hadoop](https://github.com/linaro/documentation/wiki/ODPi-BigTop-Hadoop-configuration-and-Running)