update ubuntu cli code example

Example 1: how to run a update comand in linux

sudo apt update && sudo apt upgrade -y
#or use it seperately
sudo apt update
sudo apt upgrade
#you make wanna run below command to remove unwanted
#and free up some space
sudo apt autoremove

Example 2: upgrade ubuntu command line

sudo apt update
sudo apt upgrade

Example 3: ubuntu command upgrade application

sudo apt-get dist-upgrade firefox