mkdir

mkdir a universal utility to create a directory in a *nix OS.

mkdir new_directory

That was easy!

Create full path and multiple dirs

mkdir -p some_dir/{new_dir_1,new_dir_2,new_dir_3}

The result is the creation of the following directories:

some_dir/
some_dir/new_dir_1/
some_dir/new_dir_2/
some_dir/new_dir_3/

The -p flag ignores missing parent directories and creates them. If you run this without -p it will throw an error unless some_dir/ exists