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How to Install Oracle Java 6 update 45 on Ubuntu 12.04-64 Linux
This is a step-by-step installation of Java on Ubuntu 64.
Open your console window and enter the following command:
$ java –version
If you get the following result, you already have Java 6 update 37 installed and can ignore the rest of the steps: 1 2 3
java version "1.6.0_45" Java(TM) SE Runtime Environment (build 1.6.0_45-b06) Java HotSpot(TM) Client VM (build 20.45-b01, mixed mode, sharing) Step 2: Download Oracle Java.
When new versions of Java get released, they feature on the main Java download page. If Java 6 update 45 is no longer featured, you can find the download by using this Previous Releases link found on the main download page. Open the Java download page in your browser and download both jdk-6u45-linux-i586.bin and jre-6u45-linux-i586.bin Make a note of the folder to which you downloaded the files. Step 3: Create the installation folder.
The usr/lib/jvm is the default installation directory of the Java JDK and the Java JRE. Enter the following command in your console: 1
sudo mkdir -p /usr/lib/jvm
The –p option ensures that all folders in the mkdir path 1s created. Step 4: Navigate to the folder to which you downloaded the Java installation files.
If you downloaded the files to your Home folder, you can use the following command: 1
cd ~/ Step 5: Move the downloaded files to the installation folder. 1 2
sudo mv jdk-6u45-linux-i586.bin /usr/lib/jvm sudo mv jre-6u45-linux-i586.bin /usr/lib/jvm Step 6: Change to the installation folder. 1
cd /usr/lib/jvm Step 7: Make the downloaded binaries executable. 1 2
sudo chmod u+x jdk-6u45-linux-i586.bin sudo chmod u+x jre-6u45-linux-i586.bin Step 8: Extract both compressed binary files. 1 2
sudo ./jdk-6u45-linux-i586.bin sudo ./jre-6u45-linux-i586.bin Step 9: Check your extracted folder names. 1
ls -l
Response: 1 2
jdk1.6.0_45 jre1.6.0_45 Step 10: Inform Ubuntu where your Java installation is located. 1 2
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jre1.6.0_45/bin/java" 1 sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.6.0_45/bin/javac" 1 Step 11: Inform Ubuntu that this is your default Java installation. 1 2
sudo update-alternatives --set java /usr/lib/jvm/jre1.6.0_45/bin/java sudo update-alternatives --set javac /usr/lib/jvm/jdk1.6.0_45/bin/javac Step 12: Update your system-wide PATH.
Edit your /etc/profile file using: 1
sudo nano /etc/profile
Add the following entries to the bottom of the file: 1 2 3 4
JAVA_HOME=/usr/lib/jvm/jdk1.6.0_45 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin export JAVA_HOME export PATH
Save your changes using CTRL + X. Step 13: Reload your system-wide PATH. 1
. /etc/profile Step 14: Test your new installation. 1
java –version
Response: 1 2 3
java version "1.6.0_45" Java(TM) SE Runtime Environment (build 1.6.0_45-b06) Java HotSpot(TM) Client VM (build 20.45-b01, mixed mode, sharing)
1
javac –version
Response: 1
javac 1.6.0_45 Step 15: Congratulations! You have just installed Oracle Java on Ubuntu Linux!