JAVA installation in Linux
How to set default Java using alternative command
If we have downloaded and extracted multiple java in Linux system, we can make one version of Java as default
To add new java to the alternative list use following command
#sudo alternatives --install /usr/bin/java java /opt/jdk1.8.0_56/bin/java 1000
To set new Java as default use following command
Majority of application servers and applications require Java . Here I am going to explain how to install JAVA in Linux environment. There are different vendors and different version of Java . You can get its details from Link. But here I am describing about Hotspot ( Oracle JDK )
1. Download JDK of required version from http://www.oracle.com/
There will be files 2 kind of extension 1) .rpm 2) .tar.gz download any one of it.
2. if downloaded file is with .rpm extension use
#rpm -ivh .rpm
if downloaded file is with .tar.gz extension
#tat xvzf .tar.gz
The above command will extract JDK .
Next step is add JDK's bin location in PATH variable. suppose you have extracted JDK in to /opt/ directory and you got path like /opt/jdk1.8.0_56 then add following 2 lines in /etc/profile ( just before the line "unset i " )
export JAVA_HOME=/opt/jdk1.8.0_56/
export PATH=$PATH:/opt/jdk1.8.0_56/bin
Just re-login ( or do the command "source /etc/profile") and type "java".
How to set default Java using alternative command
If we have downloaded and extracted multiple java in Linux system, we can make one version of Java as default
To add new java to the alternative list use following command
#sudo alternatives --install /usr/bin/java java /opt/jdk1.8.0_56/bin/java 1000
To set new Java as default use following command
#alternatives --config java
Enter the number shown under "Selection" column corresponding to the Java which we want to set as default
Ensure the correct version has been set, by using command
#java -version
Enter the number shown under "Selection" column corresponding to the Java which we want to set as default
Ensure the correct version has been set, by using command
#java -version