You filed the bug report against NetworkManager. But the "up.d" hook is called differently in NM, see https://netplan.io/faq#use-pre-up-post-up- etc-hook-scripts
If this is about /etc/network/if-up.d then it should be targeted towards the "ifupdown" package. I'm adding a corresponding bug task. ** Also affects: ifupdown (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2064093 Title: if-up.d files do not have effect on ubuntu 24.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/2064093/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs