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salvia
Asked: 2016-07-14 05:22:54 +0800 CST

macchanger on xubuntu 16.04 broken. Fix?

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Since the upgrade to 16.04 this command:

sudo service network-manager stop && sudo macchanger -r wlan0 && sudo service network-manager start

returns:

[ERROR] Could not change MAC: interface up or insufficient permissions: Device or resource busy

It should change the MAC, given that I sudoed, but no.

I also tried:

sudo ip link set wlan0 down && sudo ip link set dev wlan0 address 46:74:26:d5:17:04 && sudo ip link set wlan0 up

In this case, MAC was changed, the IP did not ( I always got new IP's when changing MAC) and no connection was reached

A third try:

sudo ip link set wlan0 down && sudo macchanger -r wlan0 && sudo ip link set wlan0 up

MAC did change, IP did not, and no connection was reached.

What do I have to do to get macchanger to work again?

networking

1 Answers

  1. The first set of commands are close. The error you are seeing is because your wlan0 is still up.

    sudo service network-manager stop && sudo ifconfig wlan0 down && sudo macchanger -a wlan0 && sudo ifconfig wlan0 up && sudo service network-manager start

    In a perfect world this should work as expected but network-manager resets the mac on startup in 16.04. It seems as though this is an issue with network-manager and it appears that they are aware. bugs.launchpad.net

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