Posted on Sunday March 13, 2016 by Eric Potvin
On any Ubuntu server, wirless needs to be disable, if of course it is enable.
First, let's disable the wireless network from the interface file:
sudo vi /etc/network/interfaces
Add the following line:
iface wlan0 inet manual
NetworManager don't manage interfaces configured in the interfaces file. Replace wlan0 with the interface you want to disable, if it's not the name of the built-in interface.
Then restart network manager:
sudo service network-manager restart