Chapter 21. Manually configuring the /etc/resolv.conf file

Procedure

1. As the root user, create the /etc/NetworkManager/conf.d/90-dns-none.conf file with the following content by using a text editor:

   [main]
   dns=none

2. Reload the NetworkManager service:

   # systemctl reload NetworkManager

   Note

   After you reload the service, NetworkManager no longer updates the /etc/resolv.conf file. However, the last contents of the file are preserved.

3. Optional: Remove the Generated by NetworkManager comment from /etc/resolv.conf to avoid confusion.

Verification

1. Edit the /etc/resolv.conf file and manually update the configuration.

2. Reload the NetworkManager service:

   # systemctl reload NetworkManager

3. Display the /etc/resolv.conf file:

   # cat /etc/resolv.conf

   If you successfully disabled DNS processing, NetworkManager did not override the manually configured settings.

Procedure

1. Create a file, such as /etc/resolv.conf.manually-configured, and add the DNS configuration for your environment to it. Use the same parameters and syntax as in the original /etc/resolv.conf.

2. Remove the /etc/resolv.conf file:

   # rm /etc/resolv.conf

3. Create a symbolic link named /etc/resolv.conf that refers to /etc/resolv.conf.manually-configured:

   # ln -s /etc/resolv.conf.manually-configured /etc/resolv.conf