When we open cmd or composer to run a command, we will enter a default file directory, so how do cmd return to the upper level directory, and how to enter other file directories to run commands? The specific method is shown in the figure below!
1: Add cd.. after the default command to return to the previous directory
2: cmd enters other file directories 2.1, directly add d: after the default command to enter the main directory of disk D. Same as 2.2, continue to add the cd file name after the directory to enter the word directory under the disk
