mkdir -- create a new directory

mkdir create a new directory	Command

SYNOPSIS

mkdir [-p] [-m mode] directory...

The mkdir command creates a new directory for each named directory argument.

-m mode: lets you specify permissions for the directories. The mode argument may have the same value as the mode for chmod; see chmod for more details.
-p: creates intermediate directory components that don't already exist. For example, if one of the directory arguments is dir/subdir/subsub and subdir doesn't already exist, mkdir creates it. Directories are created with the mode u+wx, which means read, write and search permissions for the owner.

Possible exit status values are:

0

Successful completion.

1

Failure due to any of the following:

— missing mode after -m

— invalid mode

— invalid command line option

— missing directory name

— inability to create the directory

Path not found: means that the preceding structure (parent directory) of the named directory does not exist.
Access denied: means that the requested directory already exists or is otherwise inaccessible.
Cannot create directory: means that some other error occurred during creation of the directory.

POSIX.2. x/OPEN Portability Guide 4.0.