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Aptitude:
sudo apt-get install software-properties-common
sudo apt update
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update

Default editor: sudo update-alternatives --config editor

No sudo password:
sudo visudo
%username ALL=(ALL) NOPASSWD:ALL

Install Python:

sudo add-apt-repository universe
sudo apt install python2
curl https://bootstrap.pypa.io/2.7/get-pip.py --output get-pip.py
sudo python2 get-pip.py

Bash

Rename files:
https://www.computerhope.com/unix/rename.htm

Move 500 jpgs:

Count directories files:

Hardware info:


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