get the list of installed packages ubuntu code example

Example 1: how to find installed packages in ubuntu

apt list --installed

Example 2: Ubuntu packages

sudo add-apt-repository ppa:xorg-edgers/ppa 
sudo apt-get update
sudo apt-get install libgl1-mesa-glx
sudo apt-get install libgl1-mesa-dri
sudo apt-get install libgl1-mesa-dev
sudo add-apt-repository --remove ppa:xorg-edgers/ppa
sudo apt install net-tools
sudo apt-get install -y unzip
sudo apt install gcc
sudo apt install g++
sudo apt install python
ln -s /usr/bin/python2 /usr/bin/python