Dietpi: Allow setting MAC in dietpi.txt and dietpi-config

[maweki]

I have some cheap (micro-)usb-to-ethernet interfaces from china that I was going to use with my raspberryPi Zeros that do not have their own ethernet interface. But these devices are very cheap and the drivers aren't the best so their MAC always gets populated with "00:e0:4c:53:44:58" (I don't actually care for the exact reason).

With one of those devices in my network, everything was fine. With a second (and third) it now isn't anymore. I know that I can edit /etc/network/interfaces but I do believe that gets overwritten by dietpi (which is fine).

So it would be really great if I could use the initial config (with dietpi.txt) to set a new MAC that is unique in my network.

[MichaIng]

I found some guide on how to do it:
http://www.aboutlinux.info/2005/09/how-to-change-mac-address-of-your.html

ifconfig eth0 down
ifconfig eth0 hw ether 00:80:48:BA:d1:30
ifconfig eth0 up

With interface name eth0 and MAC address 00:80:48:BA:d1:30

But as this will be reset on reboot, we need to store & recover the info on post-down & pre-up.
Either this can be done within /etc/network/interfaces or by using the related subfolders to place a script: /etc/network/if-down.d/ etc.
https://wiki.ubuntuusers.de/interfaces/

I would prefer the latter, as it is easier to just place files and remove them, when setting is disabled. I am not sure if this works just the same for WiFi (wlan0) and with wpasupplicant?

[Fourdee]

Marking as closed due to no progress or interest from our community.

[maweki]

Can we reopen this? I still want to implement this. This would be very good in dietpi.txt because otherwise you have to boot dietpi (but you have no working network), remove the SD card, change the interfaces file, plug the card in again and boot.

And you play the same game every time you change the network settings via dietpi-config.

[MichaIng]

@maweki, try:

cat << _EOF_ > /etc/network/if-pre-up.d/dietpi-change-mac
#!/bin/bash
ifconfig eth0 hw ether 00:80:48:BA:d1:30
_EOF_

respectively use wlan0 inside.
If this easy method works fine, for eth0 and wlan0, then I will implement it, first as "experimental" feature to DietPi.