On Sat, 16 Jun 2018, L A Walsh wrote:

  As for usefulness... haven't you ever had to type in a password on the
command line? Or, at least had it be easier to do so, but I really don't like
leaving it in a file, so I usually scroll up to the line w/the password and
just delete the line.  Problem solved.

I use history -d for that sort of thing.

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