Probably dd if=/dev/zero of=/dev/sda or whatever your system volume is
Posible to recover data, use /dev/urandom.
Only on very old hard disks, on newer disks there's no difference between overwrite patterns
With wear levelling on SSDs you may be able to recover some of the data
I did have RH Linux die while updating core libs a very long time ago. It deleted them and the system shut down. No reboot possible. I eventually (like later that day) copied a set of libs from another rh system and was able to boot and recover.
Probably dd if=/dev/zero of=/dev/sda or whatever your system volume is
Posible to recover data, use /dev/urandom.
Only on very old hard disks, on newer disks there's no difference between overwrite patterns
With wear levelling on SSDs you may be able to recover some of the data
I did have RH Linux die while updating core libs a very long time ago. It deleted them and the system shut down. No reboot possible. I eventually (like later that day) copied a set of libs from another rh system and was able to boot and recover.
Never used rh by choice again after that.