Windows command prompt

In 2023, you might be using a Windows computer as your developer workstation. You still need Linux to be a developer, but instead of figuring out how to switch, or how to dual-boot, Microsoft has created the "Windows Subsystem for Linux (WSL) that allows you to pretty much do everything Windows and Linux on the same (Windows) host by adding in all the necessary Linux bits.

See Windows Subsystem for Linux

2015 usage of the DOS command prompt

How to copy files off Windows using only the DOS command prompt

c: or d: or e: or z: or other letter with : =  to change between different drives and USB drive
dir = to check the content of the folder (what files and folders are in it)
dir /s = to check the size of the folder you are in
cd "name of the folder" = to open a folder
cd .. = to leave the folder(go one level up)
To copy a file:
xcopy "name of the file" "full address of the destination where you want to copy it" 
To copy a folder with subfolders:
xcopy "Name of the folder" "full address of the destination where you want to copy it" /s /i