Hi there I got this email address from the 'df' man page. Hope it's still active and the right place for feedback.
With recent changes to Ubuntu and the increasing use of 'snap' packaging for all sorts of things, the 'df' utility output is now quite jumbled and messy. My fairly normal system now has 17 /dev/loopNN mounts for various different software packages. I would rather not see these things by default. Or at least, I would like to have a convenient single-character flag that allows me to suppress those mounts from my 'df' output. One useful approach would be a flag that suppresses read-only filesystems. Another approach would be to suppress read-only filesystems that have no free space. Perhaps there are other good approaches too. I don't know if this issue is also relevant for 'docker' or not. Cheers JP https://askubuntu.com/questions/834093/small-snap-loop-devices-visible-in-gnome-disk-utility-or-what-is-the-function-of