How to quickly delete all data from a computer?

Question

linux

Good afternoon.
I need to quickly delete all data from my computer.
Is it enough to delete the /home/user/ folder for this?
And how can this be done through the terminal?

Answer 1

dd if=/dev/random of=/dev/sda
/dev/sda replace with the one you have.
True, dd is not very fast.

Answer 2

The fastest way is to pre-encrypt and "lose/destroy" the key.

Answer 3

Really fast and reliable - the only way
https://habrahabr.ru/company/neuronspace/blog/254671/