mkdir
Create new folder or directory, if they do not already exist already
syntex like below
mkdir [Options] directories
OPTIONS
-m, --mode=MODE set permission mode (as in chmod), not rwxrwxrwx - umask
-p, --parents no error if existing, make parent folder as needed
mkdir creates the standard entries . (dot) for the current folder
and .. (dot dot) for its parent
cd used for Change Directory
rm To Remove files
rmdir To Remove folder(s)