# ls /etc/network/if-pre-up.d/
bridge wait_iface
# ls /etc/network/if-pre-up.d/bridge
ls: /etc/network/if-pre-up.d/bridge: No such file or directory
# ls -l /etc/network/if-pre-up.d/bridge
lrwxrwxrwx 1 root root 29 Jul 16 2025 /etc/network/if-pre-up.d/bridge -> /lib/bridge-utils/ifupdown.sh
# ls -l /lib/bridge-utils/ifupdown.sh
ls: /lib/bridge-utils/ifupdown.sh: No such file or directory
# ls -l /lib/bridge-utils/
ls: /lib/bridge-utils/: No such file or directory
looks like the symlinks are wrong