How to install ESP32 esptool / esptool.py on Ubuntu

The recommended way is to install the current version using pip since the version installed using apt might be out of date:

pip install -U esptool

After that, you can use esptool.py - note that you need to call it as esptool.py, not just as esptool!

In case you are missing pip , install python3-dev using apt:

sudo apt -y install python3-pip