Here is the video version, if you prefer it:
The mkdir command is used to create a directory (or directories). (Shotts, 2019) Its usage is as follows:
mkdir dir1
for one directory, or
mkdir dir1 dir2 …
for multiple directories.
Hope you learned something useful!
References
Shotts, W. (2019). The Linux Command Line, Fifth Internet Edition. Retrieved from http://linuxcommand.org/tlcl.php. Pages 58-59