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    Beware using $(ls) in place of * is generally considered a bad practice. Because of the nature of globbing * will allow you to deal with filenames that contain whitespace, $(ls) will not. Consider a list of files, "one a", "one b", "two". With $(ls) you will iterate "one", "a" "one", "b", "two". With * you will iterate the actual file list. Commented Jan 24, 2014 at 22:49