In openSUSE forum thread <https://forums.opensuse.org/t/make-tumbleweed-hard-disk-bootable-and-grub-question/178030/265> I reported I could not not produce the "df: no file systems processed" response as root no matter the computer, OS or kernel (Debian, Fedora, Mageia, Mint, MX, openSUSE, Ubuntu; always and only using EXT4) while 100% of thread responders reported inability to produce "df: no file systems processed" as root (most if not all of whom are BTRFS users). -- Evolution as taught in public schools is, like religion, based on faith, not based on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata