# How to disable NetworkManager
# systemctl stop NetworkManager.service
# systemctl disable NetworkManager.service
rm '/etc/systemd/system/multi-user.target.wants/NetworkManager.service'
rm '/etc/systemd/system/dbus-org.freedesktop.NetworkManager.service'
rm '/etc/systemd/system/network.target.wants/NetworkManager-wait-online.service'
# systemctl enable network.service
network.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig network on
# systemctl start network.service
# systemctl status network.service