I administer a number of web servers, mostly CentOS and RedHat Enterprise Linux with cPanel and Web Host Manager. A while back our primary name server (a CentOS server with cPanel & WHM) gave problems when restarting the name service (Bind). The problem seemed like one of insufficient capacity. I was a bit surprised that this could be because we were serving only about 5,000 DNS zones, but nevertheless went ahead with an “upgrade”... In my infinite wisdom, I used the /scripts/ulimitnamed sc...