All posts tagged: java

Install JDK 7 u5 on Ubuntu 12.04 LTS (as a secondary JDK)

comments 3
Linux / Software Development

Introduction I had installed JDK 6.0 update 31 in an earlier post. However, I now need to write a Java application that requires the features available in JDK 7. In this post, I will install JDK 7 update 5 as a secondary JDK, while JDK 6.0 u31 will be the primary JDK. It’s perfectly normal to have multiple JDKs on a single machine to support the requirements of different applications. Fortunately, it’s easy to use […]

Uninstall Java from Ubuntu Linux

comments 9
Software Development

Introduction Hopefully you won’t need these instructions due to a botched install, but there may come a time where you need to uninstall a version of the JDK/JVM. These instructions are for the Oracle JDK 1.7.0 Update 4 on Ubuntu 12.04 LTS. If you are using a different version of the JDK, then change the version numbers listed below. I have also included instructions for removing the OpenJDK at the bottom of this post. Uninstall […]

Install Java JDK 6.0 update 31 on Ubuntu 12.04 LTS

comments 13
Hadoop / Pentaho

Introduction The first question is why are we installing an old JDK. The answer is that Oracle JDK 6.0 update 31 is the JDK recommended by Cloudera when installing CDH4 (Cloudera Distribution Hadoop v4). This is an update to an older version of this post. Mainly I have changed the JDK from 1.6.0_26 to 1.6.0_31 as this is the recommended JDK for CDH4. Install Java I have a 64 bit version of Ubuntu 12.04 LTS […]

Install Pentaho BI Server 4.5 on Ubuntu 12.04 LTS Desktop

comments 17
Linux / Pentaho

Overview: What is Pentaho? Pentaho is an open source Business Intelligence (BI) Suite that comes in with either commercial support ( and or community support ( This post provides instructions for the Pentaho community edition suite. Create a pentaho user and group Open a terminal and run the following commands: sudo addgroup pentaho sudo adduser --system --ingroup pentaho --disabled-login pentaho Install Java Follow the JDK installation instructions that are listed in the following post: Install […]