Many thanks to people who replied. Yes, removing /etc/shutdown.allow helps. I put a username in that file, the user I log in for everyday's working. dont know why it caused the problem.
I also found a symptom as well: `who` did not return anything. I think I am going to use sudo to shutdown, which I found easy to configure too. happy holidays! On Wed, Dec 27, 2000 at 07:47:56AM -0600, Dean wrote: > Hi Jack: > I had the same problem. I found not to > use a location in /etc/shutdown.allow but > only the user's name. hth Dean > > Jack wrote: > > > > hi all: > > > > it used to work well. I followed someone's suggestion and changed > > Ctrl-Alt-Del to shutdown the machine. Now I got this error: > > > > shutdown: no authorized users logged in > > > > which is not true. What could be wrong? > > > > thanks!