Ubuntu sandbox:
https://www.katacoda.com/courses/ubuntu/playground1804
Command to download the dataset (shortened URL for convenience):
wget 'https://bit.ly/3fP34uO' -O reviews.zip
Important commands not mentioned in the video:
cd ../
(navigate to a parent directory)
Cheatsheets:
https://github.com/LeCoupa/awesome-cheatsheets/blob/master/languages/bash.sh
Tutorials:
https://ryanstutorials.net/linuxtutorial/commandline.php
http://linuxcommand.org/lc3_lts0010.php
https://swcarpentry.github.io/shell-novice/
https://mywiki.wooledge.org/BashPitfalls - advanced