The Linux ls command parameters are detailed

-a -- all (all). List all files in the directory, including hidden files (.filename). The .. and . at the beginning of this list refer to the parent directory and your current directory. -l -- long (long). Lists the details of the contents of the directory, including permissions (mode), owner, group, size, date of creation, whether the file is a link to the rest of the system, and the direction of the link. -F -- File type. Add a symbol after each enumerated item. These symbols include: /indicates a directory; @ indicates a symbolic link to other files; * indicates an executable file. -r -- reverse. List the contents of the directory from the back to the front. -R -- recursive. This option recursively lists the contents of all directories (below the current directory). -S -- size. Sort by file size.