> We don't really care what happens to fd3. But if we did, we could fix that by directing it to /dev/null at the end. Again, showing how important the ordering

> We don't really care what happens to fd3. But if we did, we could fix that by directing it to /dev/null at the end. Again, showing how important the ordering is. it's good practice to close extra FDs for children who are not expecting it. poorly designed applications may misbehave if provided with unexpected additional FDs. you shouldn't use /dev/null for this purpose, but instead actually close it with 3>&-.