How to update java version on linux servers?

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by lonzo , in category: General Help , 25 days ago

How to update java version on linux servers?

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1 answer

by keegan.towne , 25 days ago

@lonzo 

To update the Java version on Linux servers, you can follow these steps:

  1. Check the current Java version: Open a terminal on your Linux server. Run the command java -version to display the current Java version installed.
  2. Determine the Java version you want to install: Check the Oracle Java download page or OpenJDK website to find the latest version available. Note whether you want to install the Oracle JDK or OpenJDK.
  3. Choose an installation method: There are multiple ways to install/update Java on Linux servers. Common methods include package managers, manual installation, and Java version managers (like SDKMAN and jEnv). Choose the method that suits your server's requirements and your familiarity.
  4. Update Java using a package manager (if applicable): Some Linux distributions, such as Ubuntu and Debian, offer Oracle or OpenJDK packages in their official repositories. Use the package manager specific to your Linux distribution and run the update command. For example: For Ubuntu/Debian: sudo apt update && sudo apt upgrade For CentOS/RHEL: sudo yum update
  5. Install Java manually (if no package manager option available): Download the desired Java version from the official Oracle or OpenJDK website. Choose the appropriate package for your server's architecture. Extract the downloaded archive to a specific directory. For example, /usr/lib/jvm/. Set the JAVA_HOME environment variable to point to the Java installation directory.
  6. Configure the system to use the updated Java version: If you installed Java manually, set the PATH environment variable to include the bin directory of the Java installation. For example, export PATH=$PATH:/usr/lib/jvm/{java-version}/bin. Configure Java alternatives (if using OpenJDK) by running the update-alternatives command. This will update the symbolic links for Java commands. For example: sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/{java-version}/bin/java 1 sudo update-alternatives --config java (to select the default version if multiple versions are installed)
  7. Verify the Java version: Open a new terminal or run source ~/.bashrc to apply the environment variable changes. Run the command java -version to check if the Java version has been updated successfully.


Remember to consult the documentation and specific installation guides for your Linux distribution to ensure the accuracy of the steps and compatibility with your server setup.