If you know your terminal basics, you know that
mkdir creates directories, but it can do much more. If you add the
-p flag, you can create a directory with subdirectories in a single command and save yourself the trouble of quite a bit of extra typing.
Here's an example:
mkdir -p parentdir/childdir/etc
That command will create a new directory called
parentdir with a subdirectory of
childdir and another subdirectory inside of
etc. You can make the chain go on forever if you want. Just type out the path you want to create, hit enter, and you'll have it with plenty of typing time saved.
6 Mac OS X Terminal Tips [Colmjude]