On Thu, August 28, 2014 3:30 am, Reinhard Dunkel wrote: > > On CentOS 5, I use command "su" to show a root shell. On CentOS 7, su no > longer works and I use "ssh root at localhost" instead. (I have not tried > SSH to access my CentOS systems remotely yet.) > I believe, [on CentOS 7] the user should be in the wheel group to successfully use su command (when he gives root password to the contrary to sudo command when one gives one's own password) I hope, this helps. Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++