This isn't a new problem, but it's driving me nuts since Mojave seems to have made it worse. I have a number of Macs (and other Apple devices, including an Apple TV) and all of them have now started ...

Running Red Hat 8 and using dhcp. I have a cable modem and router that uses dhcp, internet and email work great. Using dhcp changes the local host name. Which files do I need to edit to retain ...