ls

List directory contents. More information: https://www.gnu.org/software/coreutils/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 */