#apt-get and #apt is a command-line (CLI) tool which helps handling, repo and packages in Linux.
Diffrence between apt-get and apt are minimalistic, one big visual diffrence is that apt have progress bar. Nothing special.
If you learn to use one, another will not be a problem.
For using apt or apt-get you must have administrative privileges, root access.
And every apt command must start with sudo
sudo = Super User Do - or - Switch User and Do
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HANDY TIPS - if you don't want to watch video
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// update your linux system
sudo apt update
sudo apt upgrade
// install one APP from official repo
sudo apt install APP
// uninstall one APP
sudo apt remove APP
// install one APP (Telegram) from another repo
sudo add-apt-repository ppa:atareao/telegram
sudo apt update
sudo apt install telegram
// or you can use one command with &&
sudo apt update && sudo apt install telegram
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