Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?]

From	David Wright <deblis@lionunicorn.co.uk>
Newsgroups	linux.debian.user
Subject	Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?]
Date	2017-05-01 21:40 +0200
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On Mon 01 May 2017 at 14:48:13 (-0400), Greg Wooledge wrote:
> On Mon, May 01, 2017 at 01:18:58PM -0500, David Wright wrote:
> > They do. Both expect a command. You can "show" something but you can't
> > "dev" it or, at least, I don't know how to.
> 
> The surprise comes from the fact that typically you can add "dev eth0"
> to the end of one working ip command, to get another working ip command
> which is restricted to that one interface -- but not always.
> 
> ip addr show (working)
> ip addr show dev eth0 (working)
> 
> But
> 
> ip addr (working)
> ip addr dev eth0 (NOT working)
> 
> And
> 
> ip -s link show (working)
> ip -s link show dev eth0 (working)
> 
> But
> 
> ip -s link (working)
> ip -s link dev eth0 (NOT working)
> 
> Apparently, in order to understand why half of the commands work and
> half do not, you have to somehow figure out that you're currently using
> a command with an assumed verb, and that this makes a difference, in
> some way, if you try to add words that follow the assumed verb.  Like,
> "the verb is only added if the parser runs out of words" or something.

I'd assumed that the presumption of "show [everything]" was there
because non-root users can do little else, and I don't think you can
omit/assume any other verb. cf mount.

> The inconsistency is quite confusing, especially if you haven't
> scientifically attempted EVERY combination of words yet, to see which
> combinations work and which do not, in order to analyze it for patterns
> and infer the actual grammar rules.

Sure, but who would prefer "ip link" to give you a load of its BNF
rather than assuming you meant show. "ip" does give you BNF, it's
true, but with such a flexible command, where to start. "ip nt"
already fills the screen; only 16 more object types to go.

Cheers,
David.

Thread

Measuring aggregate internet useage? Richard Owlett <rowlett@cloud85.net> - 2017-04-23 12:30 +0200
  Re: Measuring aggregate internet useage? Dan Purgert <dan@djph.net> - 2017-04-24 11:40 +0200
    Re: Measuring aggregate internet useage? Richard Owlett <rowlett@cloud85.net> - 2017-04-24 13:00 +0200
      Re: Measuring aggregate internet useage? Richard Owlett <rowlett@cloud85.net> - 2017-04-24 13:20 +0200
      Re: Measuring aggregate internet useage? rhkramer@gmail.com - 2017-04-24 13:20 +0200
      Re: Measuring aggregate internet useage? Ben Caradoc-Davies <ben@transient.nz> - 2017-04-24 23:20 +0200
        Re: Measuring aggregate internet useage? Richard Owlett <rowlett@cloud85.net> - 2017-04-25 15:20 +0200
          BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Richard Owlett <rowlett@cloud85.net> - 2017-04-26 14:20 +0200
            Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Darac Marjal <mailinglist@darac.org.uk> - 2017-04-26 14:30 +0200
              Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Greg Wooledge <wooledg@eeg.ccf.org> - 2017-04-26 14:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Darac Marjal <mailinglist@darac.org.uk> - 2017-04-26 15:00 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] <tomas@tuxteam.de> - 2017-04-26 15:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Richard Owlett <rowlett@cloud85.net> - 2017-04-26 16:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2017-04-26 17:10 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Jörg-Volker Peetz <jvpeetz@web.de> - 2017-04-26 17:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Lisi Reisz <lisi.reisz@gmail.com> - 2017-04-26 17:10 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Richard Owlett <rowlett@cloud85.net> - 2017-04-26 22:30 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] <tomas@tuxteam.de> - 2017-04-27 08:50 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Fungi4All <fungilife@protonmail.com> - 2017-04-27 20:30 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] David Wright <deblis@lionunicorn.co.uk> - 2017-05-01 21:00 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] David Wright <deblis@lionunicorn.co.uk> - 2017-05-01 20:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] David Wright <deblis@lionunicorn.co.uk> - 2017-05-01 20:20 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Greg Wooledge <wooledg@eeg.ccf.org> - 2017-05-01 20:50 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] David Wright <deblis@lionunicorn.co.uk> - 2017-05-01 21:40 +0200
            Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Brian <ad44@cityscape.co.uk> - 2017-04-26 14:40 +0200
              Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Ric Moore <wayward4now@gmail.com> - 2017-04-26 16:10 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Greg Wooledge <wooledg@eeg.ccf.org> - 2017-04-26 16:20 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Ric Moore <wayward4now@gmail.com> - 2017-04-26 16:30 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet useage?] Greg Wooledge <wooledg@eeg.ccf.org> - 2017-04-26 16:40 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Curt <curty@free.fr> - 2017-04-26 18:00 +0200
                Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] <tomas@tuxteam.de> - 2017-04-26 16:40 +0200
            Re: BUG or OPERATOR error? - was [Re: Measuring aggregate internet  useage?] Jochen Spieker <ml@well-adjusted.de> - 2017-04-26 14:40 +0200

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