~/CyberRef$
mkdir
mkdir, short for make directory, is used to create new directories (folders).
Tip: You can create multiple directories at once.
Creating a Directory
Directories (folders) are essential to organizing information. Creating one in your current directory is easy:
mkdir myFirstFolder mySecondFolder
The above command would create two new folders in your current working directory.
Creating a Directory and Subdirectory
You may also create nested folders:
mkdir myThirdFolder/myNestedFolder
This would create a new folder, myThirdFolder, with a folder inside of it named myNestedFolder.
Create a Directory in a Specific Location
Lastly, you may create a folder in a specific location (in this case, /var/tmp)using:
mkdir /var/tmp/myFourthFolder
Reference
https://www.geeksforgeeks.org/linux-unix/mkdir-command-in-linux-with-examples/