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When I realized that a) `screen` exists and b) what it does, I felt like an utter fool for having gone for years—YEARS—without benefiting from it.

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Can you please elaborate here?

It is a terminal multiplexer. You will be able to find youtube videos. The gp is talking about a tool called gnu screen. If you need a more distinct token to search on try “tmux”.

On which, see: <https://news.ycombinator.com/item?id=44787374>

Pretty sure they mean GNU screen, a terminal multiplexer. Similar in functionality to tmux or zellj (a newer alternative) if you have heard of those.

Wait until you discover tmux[1].

[1]: https://github.com/tmux/tmux/wiki

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