First you have to know the linux filesystem structure
Using bash terminal, the basics
Beginner's Guide to the Bash Terminal
Installing and using mc the Midnight Commander
first a warning giving mc for a beginner is like giving a baby a loaded gun, so be careful when using it
If you need to install Midnight Commander on a Linux Mint or Ubuntu or debian it goes like this on a bash terminal:
sudo apt-get update
sudo apt-get install mc
And to start it in a bash terminal just on $ prompt mc and press Enter key
GNU Midnight Commander
you need to learn Docker RIGHT NOW!! // Docker Containers 101
Docker Tutorial for Beginners - A Full DevOps Course on How to Run Applications in Containers