Linux Internet Connectivity Troubleshooting -- 2

Hey there, I need some help with a network issue on my Linux server. It was working fine until I changed the IP, and now it’s not connecting to the internet. I think it’s a problem with the DNS or IP settings, but I’m not sure how to fix it. The server runs on Debian, and I can give you access through SSH. If you know your way around Linux and can help me fix this quickly, that would be awesome. Should be a quick fix for someone who knows what they're doing