Linux 權限的數字代号

sudo chmod ​​XXX​​ dir_name

-rwxr-xr-x    1 root     root        318412 Apr 23  2018 3GDialup
-rwxr-xr-x    1 root     root           228 Apr 23  2018 3GDialup.desktop
-rwxr-xr-x    1 root     root          3438 Apr 23  2018 3GDialup.png
drwxr-xr-x    2 root     root          4096 Jan  1  1970 bin
-rwxr-xr-x    1 root     root        518116 Apr 23  2018 usb_modeswitch
drwxr-xr-x    2 root     root          4096 Jan  1  1970 usb_modeswitch.d