ls List directory contents. List files one per line: ls -1 List all files, including hidden files: ls -a Long format list (permissions, ownership, size and modification date) of all files: ls -la Long format list with size displayed using human readable units (KB, MB, GB): 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