1. Open Settings → Wi-Fi.
2. Tap ⓘ next to eduroam.
3. Set Private Wi-Fi Address to Fixed (on older iOS, keep it on).
4. Press and hold Wi-Fi Address to copy it, then paste it here.

1. Open Settings → Network & internet → Internet (Samsung: Connections → Wi-Fi).
2. Tap the ⚙ next to eduroam.
3. Under Privacy or MAC address type, choose Randomised MAC (not “non-persistent”).
4. Copy the MAC address, often under Advanced or View more.

1. Open System Settings → Wi-Fi.
2. Click Details… next to eduroam.
3. Set Private Wi-Fi address to Fixed and copy the address shown.

1. Open Settings → Network & internet → Wi-Fi.
2. Choose eduroam’s properties.
3. Set Random hardware addresses to Off (or On, not “Change daily”).
4. Copy the Physical address (MAC).

You chose Linux. You already know how to find your MAC address, and you’ve probably written a script for it.