Question: I'm currently using a live CD and I am attempting to delete everything off of my harddrive. So, I've used the command `sudo nautilus` and attempted to delete everything off of my SSD. However, I cannot delete the folder `rofs` (Read only file system). I generally would have absolutely no issues with this, however, I believe it is causing everything I delete to come back to life upon restarting the computer.

Prior to using Nautilus to do this, I've used `sudo shred -vz -n 1 /dev/sda2`, and `dd if=/dev/zero of=/dev/sda2` but it doesn't seem to work. The grub loader still exists, I wish to demolish it, and preferably all other files. 

How can I remove the grub loader, and if possible, how can I delete the `rofs` folder entirely?

Answer: 
IF your trying to delete everything, why not use

```
$sudo gparted

```

to simply reformat? That would get rid of everything... period.

Also ROFS might refer to the medium that the live distro is written/burned/saved on (I could be wrong).
Maybe your grub resides on MBR, and by dd-ing all of /dev/sda2 you just get ride of your data, files and folders, not your boot loader.

On the other hand, If you loose your boot loader, you can't boot up with that disk at all.
So, after deleting the content, use

```
sudo fdisk /dev/sda

```

To remove that partition and write changes to table.
When that partition (dev/sda2) is completely gone and shown as free space, you're done. (still you can low-level format to make sure recovering is almost impossible.)

[Low-level formatting](http://www.dedoimedo.com/computers/low-level-formatting.html) is a procedure where you write data directly to the storage medium, bypassing the filesystem layer.