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Re: Dired command on same host


From: Manuel Giraud
Subject: Re: Dired command on same host
Date: Wed, 05 Jan 2022 10:35:22 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (berkeley-unix)

Tassilo Horn <tsdh@gnu.org> writes:

> Michael Albinus <michael.albinus@gmx.de> writes:
>
>>> I have in my init a (simple) function that does this out-of-band scp
>>> but I think that the most tricky parts (for something general pupose)
>>> are:
>>>     - how host A understand host B name?
>>>     - is host B reachable from host A?
>>
>> Must be checked, yes. But this isn't a problem for Tramp. It keeps
>> shell sessions on both host A and host B, a simple "ssh -q -o
>> ConnectTimeout=1 B exit 2>/dev/null" on host A would tell us whether
>> host B is reachable
>
> Sorry if that question just illustrates that I don't know how Tramp
> works but: is it ensured that the host B on A is the same as B on my
> local machine?  Like I could have different hosts defined as B in my
> local /etc/hosts and the one on A.

AFAIU, tramp relies on ssh here. So you are right that host B on A could
be something completely different (configured by means of /etc/hosts or
ssh config). In fact, this out-of-band could even do something
*wrong*. But I think it could be useful on a Ā«reasonableĀ» setup.
-- 
Manuel Giraud



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