On Thu, 2019-03-14 at 15:42 +0000, KM via CentOS wrote: > I should have mentioned that I tried nmtui but found no settings for > a netmask anywhere. like I said …. dummy. It's part of the IP address - so you put something like 192.168.0.1/24 for a 255.255.255.0 subnet. It's called a CIDR address. P.