I have a system I just had to rebuild due to disk failure. :=[[[ I built a Fedora 33 release from the USB download and encountered a couple problems (one reported to redhat), but this one is with "df" and redhat does not cover that.
Anyway, after I have been logged in a while DF emits an extra error line first before doing its normal job. If I re-login this goes away only to come back in time. I normally just suspend my computer so re- login only happens normally when I do a "dnf upgrade" and get a new OS. This does NOT happen on the other system I have which was upgraded from fedora32 to 33. Here is the first few lines from df - I cut the rest - note the first. Not a big issue, but annoying and confusing. Yes I am user 1000, of course. [ray@thoth ~]$ df df: /run/user/1000/doc: Operation not permitted Filesystem 1K-blocks Used Available Use% Mounted on devtmpfs 4007688 0 4007688 0% /dev ...