> 
> In some shells, like mksh, the default behaviour of ctrl-u is to kill the
> whole line. But then it's not called unix-line-discard, and I don't think
> mksh uses readline, either. The "standard" is probably just readline, though
> it makes me wonder where the "unix" came from…

Hi, to avoid run into this issues:
> The program in a Unix-like system that allocates machine resources and talks 
> to the hardware is called the “kernel”. GNU is typically used with a kernel 
> called Linux. This combination is the GNU/Linux operating system. GNU/Linux 
> is used by millions, though many call it “Linux” by mistake.

I think it is better to descript it what it ctrl-u does:

Kill backward from the cursor to the beginning of the current line.
:)

Regards,
duhuanpeng





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