I really, really dislike NetworkManager. From the way it's capitalised (doesn't look like a Unix program), the way it writes its configuration files (doesn't look like a Unix program) and the way it works different than all other network services on my system (doesn't feel like a Unix program).
Here are some of my notes on how to tame it.
Stop it the old way
Stop it using good old init.d scripts (example from Debian):
# /etc/init.d/network-manager stop
Stop it the new way
Stop it using systemd:
# systemctl stop NetworkManager.service
Disable it the new way
Disable it using systemd so that it doesn't start again when you
reboot:
# systemctl disable NetworkManager.service
Uninstall it with apt-get
# apt-get remove network-manager
