How to Install Oracle Java 8 on Ubuntu 18 04 LTS Manually
How to Download and Install Oracle JAVA 8 on Ubuntu 18.04 Manually
#installoraclejava #installjavaubuntu #java #ubuntu
Please follow below article for step by step commands
https://www.fosstechnix.com/install-o...
Prerequisites
• Ubuntu Server 18.04/16.04 LTS
• SSH access with sudo privileges
To check Ubuntu version:
$ uname -a
OR
$ cat /etc/os-release
Step 1: Download Oracle Java 8
Generally Oracle will not allow to download directly without accepting their licences. We have to create one account in Oracle java website by your personal or official mail. After accepting licence download the application from browser to local machine.
https://www.oracle.com/java/technolog...
Step 2: Copy downloaded Setup and Extract
Create a directory /opt/jdk
$ sudo mkdir -p /opt/jdk
Copy the tar file from the directory copied from local machine to server to /opt/jdk folder and execute below command:
$ sudo cp -rf jdk-8u241-linux-x64.tar.gz /opt/jdk/
$ cd /opt/jdk/
$ sudo tar -zxf jdk-8u241-linux-x64.tar.gz
Now unarchived the file and check the content by long-list:
ls
Step 3: Install Oracle Java 8 on ubuntu with Alternatives
Use update-alternatives command to configure java on your system
$ sudo update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_241/bin/java 100
Step 4: Verify Update Alternatives
Enter below command shows output:
$ sudo update-alternatives --display java
To change for alternative mode:
$ sudo update-alternatives --config java
It prompts for selecting by 0,1,2..so choose accordingly:
Step 5: Setting the JAVA_HOME and JRE_HOME Environment Variables
To define the enviroment variable:
$ sudo nano /etc/environment
Paste the below variable on the file:
JAVA_HOME=/opt/jdk/jdk1.8.0_241
JRE_HOME=/opt/jdk/jdk1.8.0_241/jre
To check variables defined:
$ source /etc/environment
$ echo $JAVA_HOME
Update the system packages
$ sudo apt-get update
Step 6: Verify Java Version
To check the java version:
$ java -version
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