ls : List directories and files A to Z

morty@c137:~$ ls
bin  Desktop  Documents  Downloads  IdeaProjects  Music  Pictures  Public  snap  Templates  Videos

ls -r : List directories and files Z to A

ls -a : Shows all directories and files with the hidden files. Hidden files appear with a . or ..

ls -t : List by time. Newest to oldest

ls -tr : List by time. Oldest to newest

ls (directory name)/(directory name) : Shows list of naming directory

ls -l : Display long listing format.(we can command ls -lh that h means file size appears from human friendly format)

ls -al : Details of directories and files

ls -R : List all directories and subdirectories recursively