Dns

Permanently change DNS:

1. Open resolved.conf by vim /etc/systemd/resolved.conf

2. Set

   # Seperate by a space
   DNS=8.8.8.8 114.114.115.115
   FallbackDNS=8.8.4.4
   

3. Restart systemd-resolved by systemctl restart systemd-resolved

4. Set auto-start by systemctl enable systemd-resolved

Temporarily change DNS:

• Change the file by vim /etc/resolv.conf and add DNS by

  nameserver 8.8.8.8
  nameserver 8.8.4.4