How To Install Java on Ubuntu 18.10 Cosmic Cuttlefish

Install Java on Ubuntu 18.10 Cosmic Cuttlefish

In this tutorial, we will show you how to install Oracle Java on Ubuntu 18.10 Cosmic Cuttlefish. For those of you who didn’t know, Java is a programming language and computing platform. It was first released by Sun Microsystems in 1995. Many programs and scripts require Java to run it, but usually, Java is not installed by default on a VPS or Dedicated Server.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of JRE (Java Runtime Environment) and JDK (Java Development Kit) on Ubuntu 18.10 Cosmic Cuttlefish.


  • A server running one of the following operating systems: Ubuntu 18.10 (Cosmic Cuttlefish).
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • SSH access to the server (or just open Terminal if you’re on a desktop).
  • A non-root sudo useror access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Oracle Java on Ubuntu 18.10 Cosmic Cuttlefish

Step 1. First, make sure that all your system packages are up-to-date by running the following apt-get commands in the terminal.

sudo apt-get update
sudo apt-get upgrade

Step 2. Installing Oracle Java on Ubuntu 18.10.

  • Method 1.

Run the following commands to install the Oracle JDK by Oracle:

sudo apt install openjdk-11-jdk
  • Method 2.

Using Webupd8 Team’s PPA repository we can install Oracle Java on Ubuntu automatically using the apt command:

sudo add-apt-repository ppa:webupd8team/java
sudo apt update
sudo apt install oracle-java8-set-default

Please note that during the Java installation process, you will have to accept the Oracle License agreement in order to complete the installation.

Verify the Installed Java version:

java -version


java 10.0.2 2018-07-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode)

If we have multiple Java versions installed on the server we can change the default version using the update-alternatives system:

update-alternatives --config java

Congratulations! You have successfully installed Java. Thanks for using this tutorial for installing Oracle Java (JRE or JDK) on Ubuntu 18.10  Bionic Beaver system. For additional help or useful information, we recommend you check the official Java website.

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