replace_nm-rocky-9.5.sh

#!/bin/bash

set -euo pipefail

dnf config-manager --set-enabled crb
dnf install epel-release -y

dnf install --refresh systemd-resolved systemd-networkd -y

systemctl enable systemd-networkd
systemctl enable systemd-resolved

systemctl disable NetworkManager

rm /etc/resolv.conf -f
ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf

mkdir -p /etc/systemd/network
cat <<EOF > /etc/systemd/network/00-default.network
[Match]
Name=enp*

[Network]
DHCP=ipv4
LLMNR=true
MulticastDNS=true

EOF

cat <<EOF >> /etc/systemd/resolved.conf
LLMNR=yes
MulticastDNS=yes
EOF

WARNING:
The script might disable remote access, meaning physical access to the machine could be needed to regain control.

Rocky Linux 9.5+

1. Replaces standard NetworkManager with systemd-network and systemd-resolved
2. Configures all wired interfaces using DHCPv4
3. Enables LLMNR and MulticastDNS