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- [Instructor] Let's go
over airmon or airmon-ng.

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Airmon is a tool within the aircrack suite

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that can be used to enable monitor mode

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on wireless interfaces.

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You can also use it to go back

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from monitor mode to manage mode.

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When you use airmon to
put a wireless adapter

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into monitor mode, it
will automatically check

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for processes running on the
systems that can interfere

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with the monitoring process.

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However, also you do,
you can do this manually

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with the, you know, command
airmon-ng check, right?

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So airmon-ng check command

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as I'm actually demonstrating here.

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Here you can see three
processes that may actually

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cause some trouble:

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the network manager, the DHCP client,

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and the wpa_supplicant.

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You can kill them all

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with the airmon-NG check kill command.

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You can do a check again.

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Now you don't see any
conflicting processes here.

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So let's start to put the wireless adapter

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in monitoring mode with the
airmon-NG start command.

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And then you specify the wireless adapter

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which in my case is wlan0.

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Now to check the status

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you can just type airmon-ng
by itself and press enter.

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Here you can see that
wlan0 is in monitoring mode

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and that I'm using an adapter
with a Atheros chip set.

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Now let me start the
network manager again.

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And if you do an iconfig,

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you can see wlan0 mon as
my monitoring interface.