/ proc / sys / dev / [ HOME SHELL ] 
Name Size Permission Action
  cdrom [ DIR ] dr-xr-xr-x  
  hpet [ DIR ] dr-xr-xr-x  
  mac_hid [ DIR ] dr-xr-xr-x  
  raid [ DIR ] dr-xr-xr-x  
  scsi [ DIR ] dr-xr-xr-x  
  tty [ DIR ] dr-xr-xr-x  

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Change Permission : mac_hid