THINK OF REDICTION AS "ASSIGNMENT"
======================================================================

You may find the order of redirections difficult to grasp:

    # redirect both stdout and stderr to a file:
    some_command >stdout_and_err.log 2>&1


If you think about redirection as "from this to that", then you may find above
counter-intuitive: why `>` before `2>&1`? Isn't that counter-intuitive?

But if you think of it as assignment in programming languages, it's much easier:


```
# first, **let** stdout be equal to `stdout_and_err.log`:
STDOUT = stdout_and_err.log

# then, **let** stderr be equal to stdout (which at this point is stdout_and_err.log
STDERR = STDOUT
```