Installing Java on Linux
Download the latest version of JDK from http://www.java.sun.com. I have downloaded jdk-1_5_0_01-Linux-i586.bin for this tutorial.
Change to the directory where you downloaded the JDK ( I downloaded it in my home directory /home/maddy) and make the self-extracting binary executable:
chmod +x jdk-1_5_0_01-Linux-i586.bin
Run the self-extracting binary, this will display the License agreement text and will ask you to accept the agreement:
Above command should create a directory called jdk1.5.0_01 in the /home/maddy directory. Move the JDK directory to /opt . Here is the command used:
mv jdk1.5.0_01 /opt
Set the JAVA_HOME environment variable, by modifying /etc/profile so it includes the following:
save /etc/profile file. Then run following command to take effect.
Check to make sure JAVA_HOME is defined correctly using the command below. You should see the path to your Java JDK.
Output should be
Now need to set out new Java by default through the alternative utility. First, we will install alternative java then we will configure it make it as default java.
To install java using the alternative command:
alternatives –install /usr/bin/java java /opt/jdk1.5.0_01/bin/java 2
Now need to configure it to make it as default Java location:
alternatives -config java
Above command will given output. There we will have to select latest java location.
[root@alpeshpc opt]#alternatives –config java
There are 3 programs which provide ‘java’.
* 1 /usr/lib/jvm/jre-1.4.2-gcj/bin/java
Give there number 2, then press enter.