Install JDK via Yum Package Manager

To install Java using Yum, first list available Java packages:

yum list java*

Proceed to install a specific JDK version, such as OpenJDK 8:

yum install java-1.8.0-openjdk.x86_64

After installation completes, verify the JDK installation:

java -version

Yum installs Java under /usr/lib/jvm. Configure environment variables by editing the system profile:

vi /etc/profile

Append these lines to the file:

# Java environment configuration
JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
PATH=$PATH:$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME CLASSPATH PATH

Apply the changes immediately:

source /etc/profile

Manual Installation Using Downloaded JDK Archive

Download the JDK archive, for example jdk-8u281-linux-x64.tar.gz, from Oracel's website. Transfer the file to your Linux server using tools like SCP or SFTP.

Extract the archive in the target directory:

tar -xzf jdk-8u281-linux-x64.tar.gz -C /opt

Set up environment variables by editing /etc/profile:

vi /etc/profile

Add these configurations at the end:

# Java environment setup
export JAVA_HOME=/opt/jdk1.8.0_281
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

Reload the profile to activate the settings:

source /etc/profile

Confirm the installation by checking the Java version:

java -version