Installing Arduino, the proper way.

WARNING: arduino-1.8.13 is the current SUPPORTED version because it actually works without problems.

Download the Arduino IDE using this link: arduino.cc.

Since you are doing this the first time...

sudo usermod -aG dialout YOUR_LOGIN_NAME

That gives you permissions for serial.

Firefox, and other browsers will normally place the package in ~/Downloads.

Type or copy and paste the following single line into a shell terminal:

(sudo mkdir -p /opt && cd ~/Downloads && tar -xvf arduino-1.8.13.tar.xz && sudo mv arduino-1.8.13 /opt) && (cd /opt && sudo ln -s arduino-1.8.13 Arduino && cd Arduino && sh ./install.sh)

Click the icon that appears on your desktop and configure for the supported boards. if you are supporting a new board, of course, install that too.

IMPORTANT! install/downgrade the AVR package to 1.8.3 if you have problems.