Bác thêm IP DNS vào là được.
1) Make sure your DNS Resolver config file is writable:
sudo chmod o+r /etc/resolv.conf
2) Temporarily change your DNS to use Google’s nameservers instead of DigitalOcean’s:
sudo nano /etc/resolv.conf
Change the IP address in the file to: 8.8.8.8
Press CTRL+X to...