update eclipse en ubuntu 20.04 code example

Example: install eclipse in ubuntu 20.04

sudo apt update
sudo apt install -y openjdk-11-jdk
wget http://mirror.umd.edu/eclipse/technology/epp/downloads/release/2020-06/R/eclipse-java-2020-06-R-linux-gtk-x86_64.tar.gz
sudo tar -zxvf eclipse-java-2020-06-R-linux-gtk-x86_64.tar.gz -C /usr/
sudo ln -s /usr/eclipse/eclipse /usr/bin/eclipse