prevent NetworkManager to update /etc/resolv.conf

NetworkManager is going to update /etc/resolv.conf but if you do not want it to do that, then update /etc/resolv.conf to desired value,and edit /etc/NetworkManager/NetworkManager.conf and add there in main section dns=none linke below

[main]
plugins=ifcfg-rh,ibft
dns=none

This will prevent updating of /etc/resolv.conf by NetworkManager

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#dns-configuration-fedora, #fedora-2, #networkmanager