Irratational Vector Field

Install Java 1.7 in Ubuntu 13.10

Install Java 1.7 in Ubuntu 13.10

1. Login as a User which has administrator rights

2. Open Terminal (Ctrl + Alt + T).

3. Type sudo su root

4. Give the password of the user which you have logged in.

5. Create the installation folder.

The /usr/lib/jvm is the default installation location of the Java JDK. Enter the following command in your Terminal to create this folder, if it does not already exist:

sudo mkdir -p /usr/lib/jvm

The –p option ensures that all folders in the mkdir path are created.

6. Change the rights for the folder.

chmod -R 777 /usr/lib/jvm

7. Now copy your JDK folder in /usr/lib/jvm directory

8. Again change the right of the windows folder.

Chmod -R 777 /usr/lib/jvm

9. Navigate to the “installation folder”.

cd /usr/lib/jvm

10 . Display the contents of the installation folder.

ls –l

Response:

jdk1.7.0_45

Make a note of the newly created folder names.

11. Inform Ubuntu where your Java installation is located.

sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_45/bin/javac" 1

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_45/bin/java" 1

12. Inform Ubuntu that this is your default Java installation.

sudo update-alternatives --set "javac" "/usr/lib/jvm/jdk1.7.0_45/bin/javac"

sudo update-alternatives --set "java" "/usr/lib/jvm/jdk1.7.0_45/bin/java"

13. Update your system-wide PATH.

Edit your /etc/profile file using:

sudo nano /etc/profile

Add the following entries to the bottom of your /etc/profile file:

JAVA_HOME=/usr/lib/jvm/jdk1.7.0_45

PATH=$PATH:$JAVA_HOME/bin

export JAVA_HOME

export PATH

Save your /etc/profile file using CTRL + X.

14. Reload your system-wide PATH.

. /etc/profile

15. Step 13: Test your new installation.

16. java –version

Note there is only a single dash before version.
Response:

java version 1.7.0_45

Java(TM) SE Runtime Environment (build 1.7.0_45-b18)

Java HotSpot(TM) Client VM (build 24.45-b08, mixed mode)

17. javac –version

Note there is only a single dash before version.
Response:

javac 1.7.0_45