![]() If you already have an active Wi-Fi interface, the third step of the above process may deliver an error message that reads, “Device or resource busy.” If that happens, you can enter the command “ ifconfig wlp3s0 down” (again – replace “wlp3s0” with your interface name) to deactivate the Wi-Fi interface. Type “ iwconfig” again to check that your Wi-Fi interface is now in Monitor Mode.Remember to replace “wlp3s0” with your Wi-Fi interface’s name. Enter “ iwconfig wlp3s0 mode monitor” into the terminal. ![]() Type “ su” to enter superuser mode, which gives you the authority to change Wi-Fi interface modes.Press “Alt + Ctrl + T” to open a terminal.You should see the name appear in the details you generate when you check your Wi-Fi interface.Īssuming you have your interface name ready, follow these steps to switch the interface from “Managed” to “Monitor” mode: This example assumes that your Wi-Fi card’s interface name is “wlp3s0,” though you’ll have to substitute this with your own card’s name. You’ll need to change that to Monitor Mode to capture Wi-Fi traffic. When you checked your Wi-Fi interface, you likely saw that it’s set to “Managed” mode. ![]() If it isn’t, you’ll likely need to replace your Wi-Fi card with one compatible with Monitor Mode. If “monitor” is on the list, your Wi-Fi card supports the Monitor Mode necessary to sniff and capture Wi-Fi traffic.
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