Re: network manager post-up hook
On Thu, Jan 08, 2026 at 09:11:08 -0500, Michael P. Soulier wrote:
> On 08/01/26 Michel Verdier said:
>
> > You can put any command in post-up or if you prefer you can add a script
> > in /etc/network/if-up.d such this one:
> >
> > $ cat /etc/network/if-up.d/postfix
> > #! /bin/sh
> > # update postfix copy of resolv.conf (picked up automatically); only default instance is handled
> > [ lo != "$IFACE" ] && cp -pLu /etc/resolv.conf /var/spool/postfix/etc/resolv.conf 2>/dev/null || :
>
> I didn't think that would run on a NetworkManager-managed interface.
> NetworkManager.conf says ifupdown support is disabled.
I did a web search for "network manager post up hook" and the first
result was
<https://askubuntu.com/questions/1111652/network-manager-script-when-interface-up>
However, I do have to wonder: why is the OP using network manager for
this interface, if they already know how to solve the problem using
ifupdown? Why not simply configure this interface in
/etc/network/interfaces and be done with it?
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