mkdir Linux is a commonly used basic commands, said that if the directory does not exist (folder) in the current path, then the new directory (folder). Its grammatical structure is as follows:
$ Mkdir [options] [directory]
where "option" is optional, that is, after mkdir can directly access parameters; "Directory" specify the list of directories to be created, separated by a space between multiple directories.
Instructions can be viewed by mkdir mkdir --help Usage: 
The following by way of example to illustrate the use of the method mkdir.
Usage 1
$ Mkdir test
This is the most basic usage, expressed in the current path to create a new test folder.
Usage 2
$ Mkdir abc
this command center abc separated by a space, create three directories represented in the current path first (folder).
Usage 3
$ Mkdir -pa / b / c
command indicates a new nested folders, a folder that is set under b folder, the folder set under b folder c. And two or more layers can be nested layers.
Usage 4
$ Mkdir -v test
this command shows a display created directory information.
Usage 5
Mkdir test1 -vp $ / test2
$ mkdir -v -p test1 / test2
these two instructions to achieve the same functionality, have indicated that while using two options.
Usage 6
The new directory permissions will not rwxrwxr-x By default, if you want to set other permissions, -m options can be used, such as:
$ Mkdir -m 777 test
this directive represents a new directory (folder) test has all the permissions.