On Fri, 9 Sep 2016, Always Learning wrote: > > On Thu, 2016-09-08 at 23:22 +0100, J Martin Rushton wrote: > >> Under Fedora23 issuing a yum command gets you a warning, then it >> automatically runs the appropriate dnf command. > > Can you tell us the DNF for:- > > yum update > yum groupinstall > yum reinstall > yum erase DNF isn't used on CentOS. Stop. If you want to learn about things that aren't part of CentOS, please do feel free, there's excellent documentation online. jh