chmod 与 linux 简要权限表 permission

        PERMISSION      COMMAND  

         U   G   W

        rwx rwx rwx     chmod 777 filename     

        rwx rwx r-x       chmod 775 filename

        rwx r-x r-x        chmod 755 filename

        rw- rw- r--        chmod 664 filename

        rw- r-- r--          chmod 644 filename


        U = User

        G = Group

        W = World


        r = Readable

        w = writable

        x = executable

        - = no permission


另外一种维度来看: 
Permissions:


400     read by owner

040     read by group

004     read by anybody (other)

200     write by owner

020     write by group

002     write by anybody

100     execute by owner

010     execute by group

001     execute by anybody

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郎啊郎别太忙 | langalang.blogspot.com