Installing Oracle Java and Tomcat on Ubuntu Server 12

Ubuntu Server comes with only a command line console so the usual GUI tools are unavailable.  You instead get to Java and Tomcat by hand. Oracle installations require the addition of another apt repository because they are license restricted from the Linux point of view.

Install Java

Enter the following commands into the VMWare visible console.
  1. Ubuntu server doesn't include add-apt-repository so first install that
    sudo apt-get install software-properties-common
    Enter "Y" if prompted.
  2. Add the repository that contains Oracle information
    sudo add-apt-repository ppa:webupd8team/java
    Press "Enter" to continue.
  3. Update the list of available packages
    sudo apt-get update
  4. Install Oracle 7
    sudo apt-get install oracle-java7-installer
    Enter "Y" and click on "<OK>" to accept the license
  5. Verify Java is installed by running
    java -version
You can set the JAVA_HOME for all processes by adding a adding a JAVA_HOME entry in /etc/environment.  You have do this with escalated privileges/sudo. I added this:
    JAVA_HOME=/usr/lib/jvm/java-7-oracle

Install Tomcat

Tomcat requires java so you must have some version installed as shown above.
  1. Install the Tomcat app server using apt-get
    sudo apt-get install tomcat7 tomcat7-admin ufw     libtcnative-1
  2. Install the Apache web server using apt-get This is optional for just hacking around in tomcat but is recommended for real production systems.
    sudo apt-get install apache2 libapache2-mod-jk 
  3. And now install the MS SQL Server, MySql and Postgresql java drivers if you are going to want them for your app-server installation
    sudo apt-get install libjtds-java libmysql-java libpg-java 
  4. Groovy is cool so install just because
    sudo apt-get install groovy
  5. Edit /etc/default/tomcat7 and set the JAVA_HOME to /usr/lib/jvm/java-7-oracle

Additional Configuration

Reconfigure the Apache mod-jk plugin that talks to Tomcat if you installed Apache2 in the previous section.
  1. Edit /etc/libapache2-mod-jk/workers.properties
  2. Change workers.tomcat_home to be point to tomcat7 instead of tomcat6
    workers.tomcat_home=/usr/share/tomcat7
  3. Change the default java version to point to the oracle JDK
    workers.java_home=/usr/lib/jvm/java-7-oracle
Restart the servers to pick up the changes

Verify 

  • Restart tomcat7 to pickup the changes
    sudo service tomcat7 restart
  • Verify the services running by hitting the tomcat server on port 8080 with your browser http://<ip>:8080/
  • Restart apache2 if installed
    sudo service apache2 restart
  • Verify the web server is running through the browser by requesting on port 80 http://<ip>
  • Verify they web server and tomcat are wired together using the link below

Credits

I was able to glean useful information on this topic from the following web sites.
  • http://www.ubuntugeek.com/how-to-install-oracle-java-7-in-ubuntu-12-04.html
  • http://magnus-k-karlsson.blogspot.com/2012/04/how-to-set-javahome-environment.html
  • https://wiki.umn.edu/Main/Tomcat7ServerOnUbuntuServer12_04LTS
  • http://thetechnocratnotebook.blogspot.com/2012/05/installing-tomcat-7-and-apache2-with.html

Comments

  1. phaedravNovember 23, 2013 at 4:13 PM

    Thanks!
    I skipped the groovy part, but I'm using that for another project. ;-)

    ReplyDelete

Post a Comment

Popular posts from this blog

Installing the RNDIS driver on Windows 11 to use USB Raspberry Pi as network attached

Image
I do a lot of my development and configuration via ssh into my Raspberry Pi Zero over the RNDIS connection. Some models of the Raspberry PIs can be configured with  gadget drivers  that let the Raspberry pi emulate different devices when plugged into computers via USB. My favorite gadget  is the network profile that makes a Raspberry Pi look like an RNDIS-attached network device.  All types of network services travel over an RNDIS device without knowing it is a USB hardware connection. A Raspberry Pi shows up as a Remote NDIS (RNDIS) device when you plug the Pi into a PC or Mac via a USB cable. The gadget  in the Windows Device Manager picture shows this RNDIS Gadget connectivity between a Windows machine and a Raspberry Pi. The Problem Windows 11 and Windows 10 no longer auto-installs the RNDIS driver that makes magic happen. Windows recognizes that the Raspberry Pi is some type of generic USB COM device. Manually running W indows Update  or  Upd...
Read more

Understanding your WSL2 RAM and swap - Changing the default 50%-25%

Image
The Windows Subsystem for Linux operates as a virtual machine that can dynamically grow the amount of RAM to a maximum set at startup time.  Microsoft sets a default maximum RAM available to 50% of the physical memory and a swap-space that is 1/4 of the maximum WSL RAM.  You can scale those numbers up or down to allocate more or less RAM to the Linux instance. The first drawing shows the default WSL memory and swap space sizing. The images below show a developer machine that is running a dev environment in WSL2 and Docker Desktop.  Docker Desktop has two of its own WSL modules that need to be accounted for.  You can see that the memory would actually be oversubscribed, 3 x 50% if every VM used its maximum memory.  The actual amount of memory used is significantly smaller allowing every piece to fit. Click to Enlarge The second drawing shows the memory allocation on my 64GB laptop. WSL Linux defaul...
Read more

Almost PaaS Document Parsing with Tika and AWS Elastic Beanstalk

Image
The Apache Tika project provides a  library capable of parsing and extracting data and meta data from over 1000 file types.  Tika is available as a single jar file that can be included inside applications or as a deployable jar file that runs Tika as a standalone service. This blog describes deploying the Tika jar as an auto-scale service in Amazon AWS Elastic Beanstalk.  I selected Elastic Beanstalk because it supports jar based deployments without any real Infrastructure configuration. Elastic Beanstalk auto-scale should take care of scaling up and down for for the number of requests you get. Tika parses documents and extracts their text completely in memory. Tika was deployed for this blog using EC2 t2.micro instances available in the AWS free tier. t2.micro VMs are 1GB which means that you are restricted in document complexity and size. You would size your instances appropriately for your largest documents.   Preconditions An AWS account. AWS ac...
Read more