Hi kenjy,
Thanks for your advice. It works for me.
$ egrep hosts /etc/nsswitch.conf
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
If there are >20 VE (guests) running the list will be a long one.
I heard winbind can solve the problem as well but never trying it. It needs only a simple setup dislike setting up bind9.
Have you had any idea on the max number of VEs (guests) can run concurrently vs CPU + RAM? Of course all of them are headless server w/o graphic not requiring huge data storage.
B.R.
satimis