@Boken-Lin , Kernel upgrade didn't go up to 3.13.0-68-generic for some reason.
I can only bring it up to 3.13.0-55-generic. insmod seemed to work, but the connection still isn't working.
After all those failed attempts, I decided to upgrade to the latest long-term supported kernel 4.1.13. I used the instructions shown at:
http://linuxg.net/install-kernel-4-1-x-on-ubuntu/
Then followed the instruction for installing the cp210x driver.
And the serial connection works now!
Anyone have problems with factory reseting their omega? I'm using the expansion dock. Pressing the reset button for 10 to 30 seconds definitely reboots the omega, but it doesn't seem to change the omega back to its factory settings.
@Anthony-Sadarangani Try expanding the storage by using USB storage. Check out Boken's tutorial on using pivot-overlay. I expanded my rootfs to 8GB by following his tutorial.
https://wiki.onion.io/Tutorials/Using-USB-Storage-as-Rootfs
One more useful package to install:
opkg update; opkg install macchanger
Also, to use the Omega in monitoring mode, remember that you can't simultaneously monitor the network and remain in the managed mode. So that means you'll need to have a very reliable USB serial connection to the Omega to configure it back to the normal mode (i.e. managed mode).
Breakthrough! I'm answering my own questions:
To be able to use the "iwconfig" command, I needed to install the wireless-tools pkg:
opkg update; opkg install wireless-tools
To be able to use the "tcpdump" command, I needed to install the tcpdump pkg:
opkg update; opkg install tcpdump
To be able to use the "airmon-ng" command, I needed to install the aircrack-ng pkg:
opkg update; opkg install aircrack-ng