Re: /dev/tcp

At Thu, 20 Aug 2026 23:30:40 -0000 (UTC), Lawrence D’Oliveiro <[email protected]> wrote:

> On Thu, 20 Aug 2026 18:15:27 -0000 (UTC), Eli the Bearded wrote:
> 
> > In comp.os.linux.misc, Lawrence DOliveiro <[email protected]> wrote:
> >>
> >> On Thu, 20 Aug 2026 00:59:41 -0000 (UTC), Eli the Bearded wrote:
> >>>
> >>> This came up in the context of "how to test network on a system
> >>> with no root and no helpful utilities installed."
> >>
> >> So a version of bash that supports /dev/tcp is somehow excluded
> >> from that “no helpful utilities installed” assumption?
> >
> > The system being tested did not have bash installed. Busybox
> > provided /bin/sh there.
> 
> I thought you said you were testing the *network*, not the *system*.
> 
> You can’t really do that (in general) without access to a proper
> suite of diagnostic tools.
> 
> In such a situation, I would try one (or both) of two things:
> 
> * Reboot the machine with a SystemRescue USB stick
>   <https://www.system-rescue.org/>. That way, I get unconstrained
>   access to an entire system custom-designed precisely for running
>   diagnostics.
> * Bring in my own machine, which already has my own custom setup on
>   it, and connect it to the network.
> 
> Both of these also have the advantage of ruling out screwups in the
> existing OS installation.
> 
> And if you’re saying the situation would not allow me to do either of
> these things, then I would not have accepted the job in the first
> place.

Have you ever agreed with someone?

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