Install JDK 8 from tar.gz Ubuntu

#Login as root
sudo su
#create jdk directory
mkdir /opt/jdk
#uncompress, change to your file name
tar -zxf jdk-8u5-linux-x64.tar.gz -C /opt/jdk
#check if files are there
#ls /opt/jdk
#update alternatives so the command java point to the new jdk
update-alternatives –install /usr/bin/java java /opt/jdk/jdk1.8.0_05/bin/java 100
#update alternatives so the command javac point to the new jdk
update-alternatives –install /usr/bin/javac javac /opt/jdk/jdk1.8.0_05/bin/javac 100
#check if java command is pointing to ” link currently points to /opt/jdk/jdk1.8.0_05/bin/java”
update-alternatives –display java
#check if java command is pointing to ” link currently points to /opt/jdk/jdk1.8.0_05/bin/javac”
update-alternatives –display javac
#check if java is running
java -version

source : https://gist.github.com/filipelenfers/ef3f593deb0751944bb54b744bcac074

Posted on: October 27, 2021, by :