dir: directory
Display files and subdirectories under the directory
md: make directory
Make a new directory
cd: change directory
Move to another directory.
cd .. means going back to the previous leve
cd > means creating a file in the current directory
rd: remove directory
Delete empty subdirectories
del: delete
Delete files
Ping plus website address enables you to check the connectivity of the network.
Exit command line.
cls: clear screen
calc: calculator
mspaint
原文：https://www.cnblogs.com/ljb2654130/p/14595634.html