List Files and Directories in Linux-Use? To replace non-outputable characters

class:Linux views:102 Author:
ls -q
List files and folders in the current directory,Use? To replace non-outputable characters
-q : --hide-control-chars   print ? instead of nongraphic characters
      --show-control-chars   show nongraphic characters as-is (the default,
                               unless program is 'ls' and output is a terminal)
Operation result
????  a.a  b.b  c.c  sudo

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