Gentoo: Memtest

Emerge the package

Emerge the sys-apps/memtest86+ package

sudo emerge --ask sys-apps/memtest86+

Grub2 setup

Grub2 doesn't need any special config. Just rebuild the boot config

sudo grub-mkconfig -o /boot/grub/grub.cfg

References

https://wiki.gentoo.org/wiki/Memtest86%2B