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“.”(dot)
In the shell, users should all know that one dot represents the current directory and two dots represent the upper directory.
CDPATH=.:~:/home:/home/web:/var:/usr/local
In the upstream CDPATH setting, the dot after the equal sign represents the current directory.
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If the file name starts with dot, the file is a special file, and the -a option must be added to the ls command. will be displayed.
In addition, in regularexpression
, a dot represents matching one character.
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