ubuntu20.04安装jdk1.8

ubuntu20.04安装jdk1.8

1. download package

link:https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html

choose this (you need login first)

2. move and unzip

mkdir -p /usr/local/programs/java/
mv jdk-8u291-linux-x64.tar.gz /usr/local/programs/java/
tar -zxvf ./jdk-8u291-linux-x64.tar.gz

3. environment configuration

1. modify

vim /etc/profile

2. append

export JAVA_HOME=/usr/local/programs/java/jdk1.8.0_291
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

3. take effect

source /etc/profile

4. verification