Change the DNS in Linux

1. Open the /etc/resolv.conf file

sudo nano /etc/resolv.conf

2. Add/modify the lines and save (CTRL + S / CTRL + X):

nameserver 192.168.1.9 # DNS 1
nameserver 192.168.1.8 # DNS 2

3. Make /etc/resolv.conf immutable: This will prevent any other services from modifying it. Use the following command:

sudo chattr +i /etc/resolv.conf

4. Test your DNS configuration: After making these changes, test if DNS resolution works using:

dig google.com