Installing Sun-Java JDK Using Bash Script :: Ubuntu

Getting Started

We are going to write simple bash script and execute it to install Sun Java. We will write content to text file using any of your favorite test editor. give it permission to execute and enjoy. hope it  works without error, else let me know issue to update it, it works fine for me on 2 different machines running Linux mint 17 and Ubuntu 14.04 respectively.

What is Bash?

Descended from the Bourne Shell, Bash is a GNU product, the "Bourne Again SHell." It's the standard command line interface on most Linux machines. It excels at interactivity, supporting command line editing, completion, and recall. It also supports configurable prompts - most people realize this, but don't know how much can be done.

Writing Script:

To write script for installation open new file named install_java.sh and put following content in it.

#!/bin/bash

# Script to install Sun Java

clear

# This command is used to tell shell, turn installation mode to non interactive
# and set auto selection of agreement for Sun Java
export DEBIAN_FRONTEND=noninteractive
echo debconf shared/accepted-oracle-license-v1-1 select true | sudo debconf-set-selections
echo debconf shared/accepted-oracle-license-v1-1 seen true | sudo debconf-set-selections


echo "Bash Script for Installing Sun Java for Ubuntu!"

echo "Now Script will try to purge OpenJdk if installed..."

# purge openjdk if installed to remove conflict
sudo apt-get purge openjdk-\* -y

echo "Now we will update repository..."

sudo apt-get update -y

echo "Adding Java Repository...."

sudo apt-get install python-software-properties -y
sudo add-apt-repository ppa:webupd8team/java -y

echo "Updating Repository to load java repository"

sudo apt-get update -y

echo "Installing Sun Java....."
sudo -E apt-get purge oracle-java7-installer -y
sudo -E apt-get install oracle-java7-installer -y

echo "Installation completed...."

echo "Installed java version is...."

java -version
   

Now we will give it permission to make it executable.

 ~$ chmod 755 install_java.sh

Now we can execute script using following command, Since installation require root excess and use sudo, script may prompt to ask password. provide password to initiate installation process.

 ~$ ./install_java.sh  

Enjoy.