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Setting up a new Amazon EC2 instance often requires two immediate steps: ensuring all system software is up to date and installing the Java Development Kit (JDK). In this tutorial, we will use the YUM package manager to update our Linux environment and install Java 8.
Step 1: Connect to Your EC2 Instance
Before running commands, you must connect to your instance. Use your terminal or a tool like PuTTY with your public IPv4 address and your private key (.pem file).
Step 2: Update Software Packages
It is crucial to start with the latest security and software patches. Run the following command to update your system:
sudo yum update
If your system is already up to date, the terminal will let you know. If not, press 'y' when prompted to proceed with the updates.
Step 3: Check for Existing Java Installation
To see if Java is already installed, run:
java -version
If you see a message saying "command not found," you are ready to install a new version.
Step 4: Search and Install Java (JDK 8)
First, list the available Java packages in the repository:
yum list java*
Once you see java-1.8.0 in the list, install it using:
sudo yum install java-1.8.0
Step 5: Verify the Installation
After the process completes, verify that Java is correctly configured:
java -version
You should now see output similar to openjdk version "1.8.0_xxx".
Conclusion
Your EC2 instance is now updated and equipped with Java 8. This provides a solid foundation for running Java applications or setting up a web server. Happy coding!
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