Comment 20 for bug 1876884

I created a file /etc/initramfs-tools/scripts/init-bottom/deconfigure-interfaces:
#!/bin/sh

rm -f /run/netplan/*

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That works fine as a workaround! Flushing the device is not needed.

> IMO option (2) is actually a proper solution, this is why I am assigning this bug to 'dropbear', as I think it should automatically cleanup the interfaces/configs it created, once they are not needed anymore.

The package is called 'dropbear-initramfs', not dropbear.

I checked what dropbear-initramfs is doing:
It installs a script `/usr/share/initramfs-tools/scripts/init-premount/dropbear` , which uses the function `configure_networking()` defined in `/usr/share/initramfs-tools/scripts/functions`.

The latter script is owned by the `initramfs-tools-core` package.

I would assign this bug to that package, as it should imo take care of leaving the networking it has setup in a sane state when starting the OS proper.