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| Installation of java on Cloudera | Big Data Practical | IndianTechnoEra |
Aim: Installation of java on Unix/Linux machine.
Installing java on Linux machine.
Step 1: Verify the existence of java in your system using
jav
javac
java –version
Step 2: For online installation of java 1.8:
sudo apt -get install default -jre
Step 3: if already installed please check the version of java.
If everything works fine it will give you the following output.
Step 4: If want to install oracle JDK customized/manual then follow these steps:
Download JDK tar file
Move extract file to destination(user/lib/jvm/jdk1.7xxxxxx)
Set .bashrc file
do following
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.8/bin/javaws" 1
Correct the file ownership and the permissions of the executables:
sudochmoda+x /usr/bin/java
sudochmoda+x /usr/bin/javac
sudochmoda+x /usr/bin/javaws
sudochown -R root:root/usr/lib/jvm/jdk1.8
Check which java is functional and path of java
sudo update-alternatives --config java
Output:
