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Add Undo Changes Made To Current Terminal Prompt as a Unix TIL

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jbranchaud
2024-10-31 19:57:05 -05:00
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# Undo Change Made to Current Terminal Prompt
I frequently use a variety of ASCII command characters like `ctrl-u` to delete
the entire line or `ctrl-a` to jump to the front of a long line so I can make
some edits toward that side of the command or `ctrl-e` to jump to the end of
the command for the same reason. I sometimes even use `ctrl-k` to delete
everything after the cursor to the end of the line.
What I didn't realize until now is that any of those actions plus regular
typing and hitting the backspace are all _undoable_.
So, if I just wiped out half the line (with `ctrl-k`) and I immediately regret
it, I can restore it with `ctrl-_`. The system keeps of history of the actions
you've taken, so you can keep hitting `ctrl-_` to undo even further.
The `ctrl-/` command does the same, per GNU's [Undo Changes in the Emacs
docs](https://www.gnu.org/software/emacs/manual/html_node/emacs/Basic-Undo.html).
[source](https://jvns.ca/ascii)