You can copy a file using the cp command:

touch test
cp apple another_apple

To copy folders you need to add the -r option to recursively copy the whole folder contents:

mkdir fruits
cp -r fruits cars

This command works on Linux, macOS, WSL, and anywhere you have a UNIX environment

Lessons in this unit:

0:	Introduction
1:	mkdir - Make Directory
2:	rmdir - Remove Directory
3:	touch - Create/Update Files
4:	▶︎ cp - Copy Files
5:	mv - Move/Rename Files
6:	open - Open Files
7:	ln - Create Links
8:	chmod - Change File Permissions
9:	chown - Change File Owner
10:	umask - Set Default Permissions