mkdir /etc/systemd/resolved.conf.d/
chmod 755 /etc/systemd/resolved.conf.d/

Pour RedHat 9

dnf install systemd-resolved

/etc/systemd/resolved.conf.d/dns_servers.conf

[Resolve]
DNS=8.8.8.8 8.8.4.4
Domains=acme.local dev.local
FallbackDNS=
 
# Work on RedHat 9. Before 'no-negative' is ignored, Default is 'yes'
Cache=no-negative
 
#StaleRetentionSec=SECONDS
 
# Fix bug 10 seconds timeout shortname resolution. Ex : '/usr/bin/host plop'
LLMNR=no
 
# Useless / not yet used
MulticastDNS=no
DNSSEC=no
DNSOverTLS=no

chmod 644 /etc/systemd/resolved.conf.d/dns_servers.conf
 
sysctemctl enable --now systemd-resolved.service
 
cp -p /etc/resolv.conf /etc/resolv.conf.bak
ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf

systemctl status systemd-resolved
 
resolvectl statistics