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From: Muttley@DastardlyHQ.org
Newsgroups: comp.unix.programmer
Subject: Re: Text based synchronous communication tool for Linux?
Date: Mon, 9 Dec 2024 09:11:50 -0000 (UTC)
Organization: A noiseless patient Spider
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On Mon, 9 Dec 2024 09:37:54 +0100
Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wibbled:
>On 09.12.2024 09:23, Muttley@DastardlyHQ.org wrote:
>> On Sun, 8 Dec 2024 18:06:38 +0100
>> Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wibbled:
>>> On 08.12.2024 17:25, Muttley@DastardlyHQ.org wrote:
>>>> On Sun, 8 Dec 2024 14:15:48 -0000 (UTC)
>>>> John McCue <jmccue@whitedwf.jmcunx.com> wibbled:
>>>>> Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wrote:
>>>>> <snip>
>>>> talk is an age old unix util that allows people on the same machine to
>chat.
>>>> Even MacOS has it installed.
>>>
>>> As said, I think the historic DEC/VAX tool worked (also) only
>>> locally; you had to log into the same VMS-system to communicate.
>>>
>>> I'm actually looking for a tool that works across distributed
>>> [Unix-]systems.
>> 
>> Set up an IRC server or there's plenty of telnet based talker programs.
>
>WRT IRC you may have missed the requirements in my OP; one was:
> * instantly/synchronously exchanging any typed characters

I suggest you consult harry potter for that then. In the real world server
software is required whether its IRC, Teams, Slack etc.

>I haven't heard of "telnet based talker programs"; care to be
>more concrete?

Talk servers that allow you to telnet to them to chat to other people. 
Clearly you have done zero research on this.