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Installing Oracle JDK / JRE in CentOS Ubuntu

Arulraj V

Arulraj V

• 2 min read

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In earlier days (while SUN), Installing JRE / JDK in a VM is very easy process just like extracting a file and use it. Now wget-ing the source file itself a bit long process. After that you have use few commands to set this newly installed Java as default Java. So I have came up with list of steps to make installing java easier in CentOS and Ubuntu.

Downloading JDK...?

In VM's usually you get terminal not GUI. So I followed command way in this tutorial. You have to add cookies to download java via wget command.

For CentOS

wget --no-cookies --no-check-certificate \
--header "Cookie:gpw_e24=http%3A%2F%2Fwww.oracle.com%2F;oraclelicense=accept-securebackup-cookie" \
http://download.oracle.com/otn-pub/java/jdk/7u55-b13/jdk-7u55-linux-x64.rpm

For Ubuntu

wget --no-cookies --no-check-certificate \
--header "Cookie:gpw_e24=http%3A%2F%2Fwww.oracle.com%2F;oraclelicense=accept-securebackup-cookie" \
http://download.oracle.com/otn-pub/java/jdk/7u55-b13/jdk-7u55-linux-x64.tar.gz

I wrote a python script to download the Oracle Java jdk / jre from terminal.

That script in https://gist.github.com/arulrajnet/7b261203499375bd0759

How to Use

wget --no-check-certificate https://gist.github.com/arulrajnet/7b261203499375bd0759/raw/download_java.py
chmod +x download_java.py
python download_java.py

It will ask for the type of package you want to download and version of package want to download. Finally the selected file will be downloaded in the current directory

download_java.py

Installing and Setting...?

In the installation to make this java as default one in the system wide.

For CentOS

rpm -Uvh jdk-7u55-linux-x64.rpm
alternatives --install /usr/bin/javaws javaws /usr/java/latest/bin/javaws 2
alternatives --install /usr/bin/java java /usr/java/latest/bin/java 2
alternatives --install /usr/bin/javac javac /usr/java/latest/bin/javac 2

For Ubuntu

sudo mkdir -p /usr/java/jdk1.7.0_55
sudo tar -xzvf jdk-7u55-linux-x64.tar.gz -C /usr/java/
sudo ln -s /usr/java/jdk1.7.0_55/usr/java/latest
sudo ln -s /usr/java/latest /usr/java/default
sudo update-alternatives --install /usr/bin/javaws javaws /usr/java/latest/bin/javaws 2
sudo update-alternatives --install /usr/bin/java java /usr/java/latest/bin/java 2
sudo update-alternatives --install /usr/bin/javac javac /usr/java/latest/bin/javac 2

For ubuntu there is a PPA released by webupd8team.

PPA way

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

Note: But that is not working since 16th March. Hope they fixed now.

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