Networking and servers • network without NetworkManager or ifupdown

On a RPI4b running trixie.
In bookworm I use a simple home grown script calling ''ip link set dev eth0 up' and sets the route that has worked for years,
In trixie I'm having difficulties after disabling NetworkManager.
/etc/network/interfaces, /etc/hosts and /etc/resolv.conf in trixie are all duplicates to what works in bookworm.
When I stopped, disabled and masked NetworkManager raising and lowering eth0 worked fine. After reboot I have no network connection even to my router.
root@RPI2:~> systemctl stop systemd-networkd; systemctl start systemd-networkd;
didn't help.
root@RPI2:~> systemctl unmask NetworkManager
root@RPI2:~> systemctl enable NetworkManager
root@RPI2:~> systemctl start NetworkManager
This didn't give me net access either so put it back.
I seem to be missing something but don't know what,
It feels like gremlins in the closet.
Suggestions?
Thanks,
Mike

Statistics: Posted by MikeMcClain46 — Mon Nov 10, 2025 12:10 am

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