硬碟回收或丟掉之前，要先全部填零，方法在這裡。 Perform a Zero Fill Using a Linux Live CD Quote the message here: sudo shred -n 2 -z -v /dev/sdc1 where -n 2 is the number of passes, -z overwrites the data with zeroes, -v displays the progress of the operation, and /dev/sdc1 is the partition you are overwriting. Hit Enter to begin the process.