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CTRL+_ is used to do UNDO in console; is it possible to map that another key combination like CMD + Z?

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  • Have you seen this discussion? Maybe it can be of help. Commented Oct 4, 2016 at 17:48

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Yes, but that depends on your shell. In bash, you have to use bind:

$ bind '\C-t':undo

This will bind Ctrl-t to undo. Note that you cannot bind Ctrl-z in most terminal emulators. Refer to help bind for more information.

If you want the current list of all key bindings, use bind -P | grep -v "not found".

In zsh, you have to use bindkey:

$ bindkey '\C-t' undo

Keep in mind that you probably want to remove the old bindings for whatever key you'll choose. For example, \C-t is bound to transpose-chars.

In case you're wondering where all those combinations come from: Emacs. See man 1 bash, section "Readline Command Names" for more information.

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  • You actually can bind Ctrl-z in zsh. Also, this does not depend on the terminal emulator, but on the shell. While a terminal emulator might prevent Ctrl-z from being used, I think it unlikely that any terminal emulator actually does do this, as this is shortcut is generally used to send SIGSTOP to the running process. Commented Oct 10, 2016 at 13:53
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    The "inability" to bind Ctrl+z or Ctrl+c is because the terminal intercepts these and sends signals instead, thus the shell does not see these characters. But if you bind Ctrl+z (or Ctrl+c) and reconfigure the terminal (e.g. stty susp ^Y intr ^U) then the binding(s) will work. Commented Aug 9, 2022 at 5:54
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    @Adaephon, that's SIGTSTP sent to the foreground process group / job, not "SIGSTOP sent to the running process". Commented Aug 9, 2022 at 6:05

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