在Ubuntu 17.10中无法启用Monitor Mode，无法使用Aircrack-ng求助

Hey there, let's get your monitor mode up and running so you can use Aircrack-ng on Ubuntu 17.10. I've walked through this exact issue with plenty of users before, so let's break it down step by step.

第一步：确认你的无线网卡支持监听模式 #

First off, not all wireless adapters support monitor mode—let's verify yours first. Run this command in the terminal:

iw list

Scroll through the output until you find the supported interface modes section. If monitor is listed there, your hardware is compatible. If not, you’ll likely need to use a dedicated penetration-testing USB wireless adapter (many budget options work perfectly for this).

第二步：准备环境（释放无线接口） #

NetworkManager and background wireless services can lock your adapter, stopping you from switching modes. Let’s shut them down:

1. Stop NetworkManager:

sudo systemctl stop NetworkManager

If that throws an error (older service naming), try:

sudo service network-manager stop

2. Kill any lingering wpa_supplicant processes that might be holding onto the adapter:

sudo killall wpa_supplicant

第三步：切换到监听模式 #

First, find your wireless interface name (it might be wlan0, wlp2s0, or similar). Run this to check:

iw dev

Note the name next to Interface (we’ll use wlan0 as an example below).

Now follow these commands:

1. Bring the interface down:

sudo ip link set wlan0 down

2. Switch to monitor mode:

sudo iw dev wlan0 set type monitor

3. Bring the interface back up:

sudo ip link set wlan0 up

第四步：验证监听模式是否生效 #

Check if the mode change worked with:

iw dev wlan0 info

Look for the line that says type monitor—if that’s there, you’re ready to go! Test it with Aircrack-ng’s airodump tool:

airodump-ng wlan0

You should see nearby wireless access points pop up if everything’s working correctly.

常见问题排查 #

• Driver issues: If you’re using a Broadcom adapter, you might need to install the correct driver. Run:

sudo apt update && sudo apt install bcmwl-kernel-source

Note: If Secure Boot is enabled on your system, you’ll need to disable it first—otherwise the kernel module won’t load.

• Mode switch fails: Double-check no other processes are using the adapter. Run sudo lsof | grep wlan0 to see active programs attached to it, then kill those processes.
• Reverting to normal mode: When you’re done testing, switch back to managed mode to use your wireless normally:

sudo ip link set wlan0 down
sudo iw dev wlan0 set type managed
sudo ip link set wlan0 up
sudo systemctl start NetworkManager

内容的提问来源于stack exchange，提问作者Navod Rathnayake