Liunx has no concept of drive letter, only one root directory
pwd: View the current directory
ls: View the files in the current directory
cd: open a directory, switch the operation path
cd ..: open the upper directory
方向键上下: up: get the previous command, down: get the next command
clear: empty the entire directory
ls -l: open the file as a list Directory
ls -a: open the hidden file directory
ls .*odt: find the file ending with txt
ls 1*: find the file opened with 1: find the file
ls 1*.odtwith any character between 1 and .odt
ls ?.odt: find any odt file consisting of one character
ls [1234].odt: find 1.odt Or 2.odt or 3.odt or 4.odt that meets the requirements
ls[1-5].odt: find 1.odt or 2.odt or 3.odt or 4.odt or 5.odt that meets the requirements