I found today that my Home folder is full.  The culprit seems to have been a roughly 1/2 terabyte .xsession-errors file.  I deleted it, but 'emptying the trash' didn't seem to be clearing any space.  I found that everything I'd thought I'd deleted recently seemed to still be sitting in $uname/.local/share/Trash.  I selected everything in that folder and typed shift+delete.  Now nothing shows in the Trash folder, but my Home folder is still full.  I rebooted, and that's still the case.  What now?