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Try pressing Control+[ immediately followed by h. Terminals do not send key presses directly to the shell (as in Control was pressed/released). Instead the terminal sends character sequences depending on keys pressed. The keys in a sequence are to be pressed - well - in sequence, not all at once. The big exception to this are the Control-keys and the ...


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With recent Linux, printf foo > /proc/$$/comm will change the executable name (the ps -p thing) provided "noclobber" isn't set (and the wind is in the right direction). In zsh, printf foo >! /proc/$$/comm works regardless of clobbering state.


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^[ actually means Escape character. Check here: https://en.wikipedia.org/wiki/ASCII In your case it seems your ALT key works as a synonym for Escape key: https://en.wikipedia.org/wiki/Alt_key



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