How to install (JRE) Java Runtime Environment - arrivu/beacon GitHub Wiki
How to install (JRE) Java Runtime Environment
Download the 32bit or 64bit Linux "compressed binary file" - it has a ".tar.gz" file extension and uncompress it
Download JRE from Here
# http://www.oracle.com/technetwork/java/javase/downloads/index.html
From Download Location we need to move the JRE tar package to the Directory
# #sudo mv jre-7u40-linux-x64.tar.gz /usr/lib/jvm
Navigate to the Directory
#cd /usr/lib/jvm
Then uncompress it
#sudo tar -zxvf jre-7u40-linux-x64.tar.gz
Then if we need to remove the tar file use below command
#sudo rm jdk-7u21-linux-i586.tar.gz
List the files
# ls -l
Open the directory
# cd jre1.7.0_40
Afterwards run the following to get a list of currently installed java alternatives
# sudo update-alternatives --config java
We will get
There are 3 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 auto mode
1 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 manual mode
2 /usr/lib/jvm/jdk1.7.0_40/bin/java 1 manual mode
3 /usr/lib/jvm/jre1.7.0_40/bin/java 0 manual mode
Press enter to keep the current choice[*], or type selection number: 3
Select Zero For Auto Mode Here i have selected 0
Note : > if there was no previous java installation then the new JRE will be the default and you will not see the above.
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jre1.7.0_40/bin 0
This will add your new JRE 7 installation into alternatives list i.e. use the remembered number + 1 i.e. 3 in the example above. Now configure java to use the Oracle Java JRE
Check the version of you new JRE 7 installation
#java -version
Output Will be like this
java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.13.04.2)
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
Or use the Step Below to get easier
#java -version
#sudo mkdir -p /usr/lib/jvm
#sudo mv jre-7u40-linux-x64.tar.gz /usr/lib/jvm
#cd /usr/lib/jvm
#sudo tar zxvf jre-7u40-linux-x64.tar.gz
#sudo rm jre-7u40-linux-x64.tar.gz
#ls -l
#jre1.7.0_40
#sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jre1.7.0_40/bin/javac" 3
#sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jre1.7.0_40/bin/java" 3
#sudo update-alternatives --set "javac" "/usr/lib/jvm/jre1.7.0_40/bin/javac"
#sudo update-alternatives --set "java" "/usr/lib/jvm/jre1.7.0_40/bin/java"
#sudo vi /etc/profile
Add the following entries to the bottom of your /etc/profile file:
#JAVA_HOME=/usr/lib/jvm/jre1.7.0_40 PATH=$PATH:$JAVA_HOME/bin export JAVA_HOME export PATH
#. /etc/profile
#java -version
After this we need to Add the Jre Plugins in Google chorme and mozilla For that
Follow these instructions to enable Java in your web browser on Ubuntu Linux.
Google Chrome
Become the root user by running the su command and then enter the super-user password. Type:
# sudo -s
Create a directory called plugins if you do not have it. Type:
# mkdir -p /opt/google/chrome/plugins
Go to Google chrome plugins directory before you make the symbolic link. Type:
# cd /opt/google/chrome/plugins
Create a symbolic link. Type:
# ln -s /usr/lib/jvm/jre1.7.0_40/lib/amd64/libnpjp2.so
Restart your browser and test Java Here in Below Link
# http://www.java.com/en/download/testjava.jsp
Mozilla Firefox
Become the root user by running the su command and then enter the super-user password. Type:
# sudo -s
Create a directory called plugins if you do not have it. Type:
# mkdir -p /usr/lib/mozilla/plugins
Go to Google chrome plugins directory before you make the symbolic link. Type:
# cd /usr/lib/mozilla/plugins
Create a symbolic link. Type:
# ln -s /usr/lib/jvm/jre1.7.0_40/lib/amd64/libnpjp2.so
Restart your browser and test Java in below link
# http://www.java.com/en/download/testjava.jsp