小编aos*_*235的帖子

  HIST_FIND_NO_DUPS
         When searching for history entries in the line editor, do not display duplicates of a line previously found, even if  the  duplicates  are  not contiguous.

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但是，当我重复使用 Ctrl-p 时，会出现相同的命令。

$ ls
$ pwd
$ ls
$ <Ctrl-p> => ls 
  <Ctrl-p> => pwd
  <Ctrl-p> => ls  again!

zsh 5.0.5 (x86_64-apple-darwin14.0)