With $ sudo adduser --extrausers testuser I'm no longer getting the "cannot open /var/lib/extrausers/subuid". So I'll mark this one as fixed. I'm getting the chfn error, so let's keep that one.
With $ sudo adduser --extrausers testuser I'm no longer getting the "cannot open /var/lib/ extrausers/ subuid" . So I'll mark this one as fixed. I'm getting the chfn error, so let's keep that one.