HI
Installing Oracle JRE or JDK 8 on Debian or Ubuntu Systems
Configure your system to use the latest version of [Oracle Java SE 8 JRE or JDK] (1.8u151minimum). Java 9 and later are not supported.
Note: After installing the JDK, you may need to set JAVA_HOME to your profile:
- For shell or bash:
export JAVA_HOME=path_to_java_home
- For csh (C shell):
setenv JAVA_HOME=path_to_java_home
- Check which version of the JDK your system is using:
java -version
If the OpenJDK is used, the results should look like:
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-b09)
OpenJDK 64-Bit Server VM (build 25.242-b09, mixed mode)
If Oracle Java is used, the results should look like:
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)
- If necessary, go to [Oracle Java SE Downloads] accept the license agreement, and download the installer for your distribution.
The Oracle JDK License has changed for releases starting April 16, 2019. See Java SE Development Kit 8 Downloads.
Note: If installing the Oracle JDK in a cloud environment, download the installer to your local client, and then use scp (secure copy) to transfer the file to your cloud machines.
- Make a directory for the JDK:
sudo mkdir -p /usr/lib/jvm
- Extract the tarball and install the JDK:
sudo tar zxvf jdk-version-linux-x64.tar.gz -C /usr/lib/jvm
The JDK files are installed into a directory called /usr/lib/jvm/jdk-8u_version.
- Tell the system that there’s a new Java version available:
sudo update-alternatives --install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.8.0_version/bin/java” 1
Note: If updating from a previous version that was removed manually, execute the above command twice, because you’ll get an error message the first time.
- Set the new JDK as the default:
sudo update-alternatives --set java /usr/lib/jvm/jdk1.8.0_version/bin/java
- Verify the version of the JRE or JDK:
java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)
Regards
SRI