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How to install Oracle Java and JDK in Ubuntu Server 20.10,How to Install JDK on Ubuntu 20.10 Server

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Oracle Java and JDK:-

1. sudo apt-get update
2. sudo mkdir /usr/lib/jvm
3. cd /usr/lib/jvm
4. sudo tar -xvzf /mnt/jdk-8u221-linux-x64.tar.gz
5. sudo gedit /etc/environment
6. PATH=”/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/jdk1.8.0_221/bin:/usr/lib/jvm/jdk1.8.0_221/db/bin:/usr/lib/jvm/jdk1.8.0_221/jre/bin”
J2SDKDIR=”/usr/lib/jvm/jdk1.8.0_221″
J2REDIR=”/usr/lib/jvm/jdk1.8.0_221/jre”
JAVA_HOME=”/usr/lib/jvm/jdk1.8.0_221″
DERBY_HOME=”/usr/lib/jvm/jdk1.8.0_221/db”

7.sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.8.0_221/bin/java” 0
sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/lib/jvm/jdk1.8.0_221/bin/javac” 0
sudo update-alternatives –set java /usr/lib/jvm/jdk1.8.0_221/bin/java
sudo update-alternatives –set javac /usr/lib/jvm/jdk1.8.0_221/bin/javac

8. update-alternatives –list java
update-alternatives –list javac

9. java -version

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