Re: Trying to understand man page for dd

[Richard Owlett <rowlett@cloud85.net>]

On 05/28/2017 07:04 AM, The Wanderer wrote:
> On 2017-05-28 at 07:58, Richard Owlett wrote:
>
> > It says in part:
> >
> > > Sending a USR1 signal to a running 'dd' process makes it print I/O
> > > statistics to standard error and then resume copying.
> > >
> > >     $ dd if=/dev/zero of=/dev/null& pid=$!
> > >
> > >     $ kill -USR1 $pid; sleep 1; kill $pid
> >
> > I think it is trying to tell me what I need to know.
> > But there is too much going on there,
> > Guidance please.
> > TIA
>
> Can you clarify what it is that you don't understand, or what it is
> that you need to know?
>
> Because the part you quoted (which I do recognize, and have made use
> of myself in the past) seems perfectly straightforward and
> understandable to me, and you haven't provided any context to
> indicate what your problem is or what it is that you don't understand.

I suppose what I want is a translation of those two lines of script.
The man page just tosses it at me cold.
I didn't say what I was thinking because it would be pure noise.
Than man page was trying to convey something.
It did not.