I have a laptop that is barely alive. The screen is busted. The power cord is frayed. The power indicator flashes red sometimes. Etc. So I want to wipe the hard drive as effectively as I can before I take it into recycling today. The usual way to do this is to boot DBAN from a flash drive, but, oh no! I don't have a spare flash drive or any CDs!
What is the most effective way to wipe data from a hard drive if one is restricted to trying to do so from the Linux OS currently installed on the drive? Or from the BIOS I suppose. I ask because I assume there is something better than
rm -rf --no-preserve-root /.
dd if=/dev/zero of=/dev/sdaor something related.
Remove and disassemble the drive with a hammer. But does that make it harder to recycle? I'm not actually sure how hard drives are recycled. :) But I'd rather not do this.