I wanted to assign a static IP address to a USB-to-Ethernet interface. Edit
/etc/network/interfaces… easy, right? Then the NetworkManager starts to periodically get involved and make conflicting changes. I’m not yet ready to embrace its GUIness, so I wanted to just disabled it.
Turns out it’s easy if you know where to look:
sudo vi /etc/NetworkManager/NetworkManager.conf
# Add a line like this (comma-separated list of
# Ethernet MAC addresses of interfaces to ignore):
# Then restart NetworkManager
sudo service network-manager restart
It should then leave your interface(s) in peace.