![]() The data will not be accessible by your system. Can also try the command "shred" ex: # shred -n 6 -z -v personalinfo.tar. If you restore a computer to factory settings does not completely wipe the memory off your computer.try the command "wipe filename" (cf more detail man wipe or wipe -h).From there, choose the Reset this PC option once the results have popped up. This looks like a cog wheel, and it is where you will access all of the major settings on your laptop. Click on the Start menu and choose the Settings option. Filling the third partition with random data : dd if=/dev/urandom of=/dev/sdX3 bs=1M #replace X with the target drive letter. There are two ways to access the reset option: 1.Filling the second partition on the /dev/sda disk with all zeros : dd if=/dev/zero of=/dev/sdX2 bs=1M #replace X with the target drive letter.If /dev/sda is the whole disk, then (on Linux, because the naming scheme vary from one Linux to another) /dev/sda3 is the third partition on the disk. You can wipe a partition using the same method than for the whole disk. ![]() As the system restarts, you will be prompted to configure the system as you did when it was first taken out-of-the-box. When the process is complete, click Done to Reboot. If you messed up your master boot record (MBR) you can wipe it using this command :ĭd if=/dev/zero of=/dev/hdX bs=446 count=1 #replace X with the target drive letter. Once you click on Start, it will copy all the files and reset the operating system, drivers and applications to the factory defaults. If you replace the device name, you can also wipe USB sticks and other peripherals. Use for example gparted to find the correct drive. sda is usually the first hard drive, the second drive would be sdb and so on. ![]() Important Note: You need to replace sdX with the device name you want to overwrite. The reason one should fill with urandom in case of required security is explained here:
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