cp
Role: Copy files
Usage: cp original file name new file name
Copying multiple files, copy the dev and mvp, placed under zou directory
mv
Role: moving files
Note: the equivalent of the current directory renaming
If present abcd abcd will move to the new, if not, then rename
rm
Role: Delete Files
Usage: rm filename
Parameters: -f forcibly removed, do not ask, -r recursively delete
