So of course I use airmon-ng to enter monitor mode. I kill the processes that might interrupt (the ALFA works much better without them).
I get a handshake. Then I cannot figure out how to start using ethernet or either of the wireless cards again.
I have tried: ifconfig wlan0 up, iwconfig wlan0 mode managed, and a few other similar simple commands.

Could someone please tell me how to access the internet again after using monitor mode and killing those processes?