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I have recently discovered that if we press Ctrl+X Ctrl+E, bash opens the current command in an editor (set in $VISUAL or $EDITOR) and executes it when the editor is closed. But it doesen't seem to be documented in the man pages.

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    Search for edit-and-execute-command in the man page. – n. 'pronouns' m. Aug 3 '13 at 7:41
  • Yes, I got it now. – Kartik Aug 3 '13 at 7:44
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    If you use Bash's vi mode, the short cut is Esc, V. I trigger this all the time by accident. Finally learned what it means today :) – Mark E. Haase Sep 23 '14 at 14:43
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I have found it out now. I should have read it more carefully before asking this.

The man page says:

edit-and-execute-command (C-xC-e)
          Invoke  an  editor  on the current command line, and execute the
          result as shell commands.   Bash  attempts  to  invoke  $VISUAL,
          $EDITOR, and emacs as the editor, in that order.
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    Be very careful with this feature. If you cancel the edit, the original command line will be immediately executed. So if you are editing rm -rf / and invoke the editor and realize you are into something dangerous and thus cancel the edit, your rootfs will be deleted without further questions asked. – marlar Dec 26 '19 at 22:44

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