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Groups > linux.debian.user > #181554

Re: Trying to understand man page for dd

From David <bouncingcats@gmail.com>
Newsgroups linux.debian.user
Subject Re: Trying to understand man page for dd
Date 2017-05-29 02:50 +0200
Message-ID <tMh2F-MD-5@gated-at.bofh.it> (permalink)
References <tM51v-1tL-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 28 May 2017 at 21:58, Richard Owlett <rowlett@cloud85.net> 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.

If you browse to explainshell.com and paste shell commands that you
don't understand,
it parses the commands and gives excerpts from relevant docs, which
might help you
in future.

I pasted your two command above, and received the following results.
(If perhaps these links dont work, just paste the commands yourself).

https://explainshell.com/explain?cmd=dd+if%3D%2Fdev%2Fzero+of%3D%2Fdev%2Fnull%26+pid%3D%24!

https://explainshell.com/explain?cmd=kill+-USR1+%24pid%3B+sleep+1%3B+kill+%24pid

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Thread

Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-28 14:00 +0200
  Re: Trying to understand man page for dd JPlews <jw@plews.org.uk> - 2017-05-28 14:10 +0200
    Re: Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-28 14:30 +0200
    Re: Trying to understand man page for dd Ulf Volmer <u.volmer@u-v.de> - 2017-06-02 00:00 +0200
      Re: Trying to understand man page for dd Curt <curty@free.fr> - 2017-06-03 14:00 +0200
  Re: Trying to understand man page for dd The Wanderer <wanderer@fastmail.fm> - 2017-05-28 14:10 +0200
    Re: Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-28 14:30 +0200
  Re: Trying to understand man page for dd "Thomas Schmitt" <scdbackup@gmx.net> - 2017-05-28 14:50 +0200
    Re: Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-28 15:00 +0200
  Re: Trying to understand man page for dd David <bouncingcats@gmail.com> - 2017-05-29 02:50 +0200
    Re: Trying to understand man page for dd "Thomas Schmitt" <scdbackup@gmx.net> - 2017-05-29 08:30 +0200
      Re: Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-29 14:10 +0200
        Re: Trying to understand man page for dd David Wright <deblis@lionunicorn.co.uk> - 2017-05-29 15:40 +0200
          Re: Trying to understand man page for dd Richard Owlett <rowlett@cloud85.net> - 2017-05-29 16:20 +0200
            Re: Trying to understand man page for dd "Thomas Schmitt" <scdbackup@gmx.net> - 2017-05-29 17:20 +0200
            Re: Trying to understand man page for dd David Wright <deblis@lionunicorn.co.uk> - 2017-05-29 17:20 +0200
        Re: Trying to understand man page for dd David <bouncingcats@gmail.com> - 2017-05-30 04:30 +0200
    Re: Trying to understand man page for dd mbroe@oakland.edu - 2017-05-31 15:20 +0200

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