Within the GNU/Linux ecosystem there are all kinds of tools to diagnose the system, or rather, to check the state of the hardware, but there are few distributions specifically designed to perform this task, or at least that I know of, because the only distribution I know that is intended to diagnose the computer, (Or at least one of the components), is memtest86+, so I would like to know what other distributions exist in addition to the one mentioned above
Parted magic
Gparted Live
Rescuetux
RefiFind < this one saves me alot when i brick my bootloader :)