is there a way to do a certain command in console repeated x times?

[dull raptor]

i want to boot by USB-stick on an infested win system and overwrite the whole HDD x times with random bits to "cauterize" the HDD

[dull raptor]

would
blkdiscard -fvsz /dev/sdx (in case of an SSD)
and shred -fuvz -n=5 /dev/sdx be sufficient for that task?

[subtle forge]

yes or just use Shred OS, a bootable tool

[dull raptor]

so, currently, i run blkdiscard -fvsz /dev/nvme0n1 andplan to run shred -fuvz /dev/nvme0n1 once it is finished

[stable echo]

or the good old dd (disk destroyer!) if it's your only disk, try:
sudo dd of=/media/path/to/infected/disk if=/dev/random

[dull raptor]

i might do that tomorrow before installing mint on the disk