mkdir - make a directory
mkdir [-p] [-m mode] directory ...
-m Create directory with mode
-p Create missing intermediate directories
mkdir dir # Create dir in the current directory
mkdir -p /user/ast/dir
# Create the /user/ast and /user/ast/dir
The specified directory or directories are created and initialized. If
any intermediate directory is missing and -p is specified, the missing
component will be created and no error displayed if directory already
exists. If the -m flag is used, this will be equivalent to a chmod on the
directory after its creation.
chmod(1), rmdir(1), mkdir(2).