Recently there was a thread about system space used. Mods removed it because it was a spammer posting a seemingly legit question. At any rate for a long time I noticed a discrepancy in the values given by various methods. Baobab, closely matches any of the various commands like
and
however they do not match Gparted and by a wide margin Disks. I would be interested to know which is closest to accurate. I can post some examples if merited.