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
SystemRescue and GParted live are the ones I always keep around on a Ventoy drive.
Also a live ISO for the distribution you’re currently using would be a good idea, if they make one. It can help a lot to attempt a rescue with something that knows where everything is on that particular distro. It makes it a lot easier to regenerate a Grub menu or recover a borked package manager or other distro-specific stuff like that.
Yeah you’re right, I even needed to use my distro’s live system (which is also the installer) a few times to reinstall grub after something overrode it, so that too.
What’s your use case for the gparted system, though? Systemrescue also contains gparted, and it also has a better quality environment (easier to switch keyboard layout, I think correct display resolution from the start, fewer questions on startup)
Belt and suspenders mostly, sometimes one ISO will boot on one PC where another won’t.