How to change DNS ip address in RHEL (Red Hat Enterprise Linux)

You can change the DNS IP address in Red Hat Enterprise Linux by editing the network configuration file. Here’s how:

1. Open the network configuration file: sudo nano /etc/sysconfig/network-scripts/ifcfg-<interface> where <interface> is the name of your network interface (e.g. eth0).
2. Modify the DNS line to the desired IP address, e.g.: DNS1=8.8.8.8
3. Save the file and exit the editor.
4. Restart the network service to apply the changes: sudo systemctl restart network
5. Verify the changes by checking the DNS resolution: nslookup google.com

Note: The exact file path and instructions may vary depending on the version of Red Hat Enterprise Linux you are using.