on #ls -l command Different types of files observed

• d - The entry is a directory.
• D - The entry is a door.
• l - The entry is a symbolic link.
• b - The entry is a block special file.
• c - The entry is a character special file.
• p - The entry is a FIFO (or “named pipe”) special file.
• s - The entry is an AF_UNIX address family socket.
• -   - The entry is an ordinary file.