DNS settings problems

I am using Mate 18.04 and trying to set the DNS settings. I can change then and they will stay until the computer is rebooted. How can I make the changes permanent? And I am a newcomer to Linux and not much good with terminal.
Thanks, Sam

HI,
make and upload screenshot showing how/where you try to set dns

I go to Control Center/Network/DNS. I unlock and add the DNS I want and then lock it. Works until I reboot.
Screenshot%20at%202019-02-17%2007-36-17|685x500

Apparently I do not know how to add screenshot

Try this

3 answer with 27 votes

thanks for the links. Got it working now. Sam