emperor@Emperor:~$ sudo airmon-ng start wlan0; iwconfig
[sudo] password for emperor:
Found 5 processes that could cause trouble.
If airodump-ng, aireplay-ng or airtun-ng stops working after
a short period of time, you may want to kill (some of) them!

  PID Name
  925 avahi-daemon
  933 avahi-daemon
  978 NetworkManager
 1133 wpa_supplicant
 9267 dhclient

PHY	Interface	Driver		Chipset

phy0	wlan0		wl		Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)Cannot find device "wlan0mon"
Failed to set wlan0mon up using ipcommand failed: No such device (-19)

		(mac80211 monitor mode vif enabled for [phy0]wlan0 on [phy0]wlan0mon)
command failed: Operation not supported (-95)
		(mac80211 station mode vif disabled for [phy0]wlan0)


eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off