Knute Johnson linux at
Wed Jul 9 04:19:19 UTC 2008

William Case wrote:
> Tim;
> I may be way off base here; I am not up on things dealing with networks
> in general and Network Manager in particular.  But ...
> On Wed, 2008-07-09 at 11:02 +0930, Tim wrote:
>> Tim:
>>>> An alternative would be to put a restart script into the Network Manager
>>>> Dispatcher directory.  That way sendmail will be restarted any time the
>>>> network goes down and up.  A smart script would check whether it should
>>>> restart a running service, or do nothing to a deliberately stopped
>>>> service.
>> Knute Johnson:
>>> Could you provide a little more detail on exactly how to do this? 
>> I've attached a not-so-intelligent script for restarting the NTP daemon
>> (it starts or restarts it, but doesn't "do nothing" if NTPD were
>> manually stopped beforehand).  When a network interface comes up, it
>> starts NTP if it's not already running, it restarts it if were.  And
>> when the interface goes down, it stops it.  The LOGGER bit, in it, is
>> about putting entries into /var/log/messages, as well.
>> You could modify it to start/restart sendmail, or any other service, and
>> modify it leave to leave the service running all the time.
> I think I had a similar problem with Boinc; got lots of suggestions from
> the list.  Some of them even worked.  I filed a bug against Network
> Manager and got the following response:
> ----------------------------------------------------------------------------
>              Status|NEW                         |CLOSED
>          Resolution|                            |NOTABUG
> ------- Additional Comments From dcbw at  2008-07-02 19:04 EST
> -------
> Boinc is probably starting so soon after NetworkManager that the network
> is not up yet.  It's technically a bug in Boinc that it doesn't wait for
> a network connection and periodically re-try to send/grab the data.  But
> for the moment, you can add the line:
> to /etc/sysconfig/network and startup will block for 10 seconds or until
> a network connection is up, whichever is sooner.
> This solution avoids the restart.  Maybe this will work for sendmail as
> well.


That worked too but on the laptop where the network will be started and 
stopped I think Tim's solution is going to work better for me.

Thanks very much for chiming in though, I did learn something new.


Knute Johnson
linux at

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