How can I edit the search domain of a linux vm on azure

Question

I have a RHEL 9 VM running on azure and I would like to change the Search domain in the resolv.coonf file, if I do that it gets reset with the reboot.

I could change from networking settings the DNS servers, but for the search domain I can't find an option to make them custom

Answer 1

Hi Sahar Yacout,

I have shared troubleshooting steps which I have tried from my end, it worked for me.

First log into VM, then check your DNS domain. Below is my default DNS domain.
Edit the file /etc/dhcp/dhclient.conf and add the search domain and save the file.

append domain-search "test.example.com";

then Restart Networkmanager sudo systemctl restart NetworkManager
Now check the /etc/resolv.conf file, search domain is successfully added to the network interface: I have rebooted, you can see that search domain is not resetting For more information, please visit https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/linux/custom-dns-configuration-for-azure-linux-vms?tabs=RHEL#configure-search-domains

If you have any further queries, please do let us know.

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