ls

  List files one per line:
    ls -1

  List all files, including hidden files:
    ls -a

   List all files, with trailing `/` added to directory names:
    ls -F

  Long format list (permissions, ownership, size, and modification date) of all files:
    ls -la

  -Long format list with size displayed using human-readable units (KiB, MiB, GiB):
    ls -lh

  Long format list sorted by size (descending):
    ls -lS

  Long format list of all files, sorted by modification date (oldest first):
    ls -ltr

  Only list directories:
    ls -d */