Interesting new feature

Arran Cudbard-Bell a.cudbard-bell at sussex.ac.uk
Fri Apr 24 01:16:20 CEST 2009


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Hi John,
>
>> Interesting indeed. I can see a use for this. How do you initiate the
>> HUP ? Via the radmin tool ?
>>  

I know what HUP is :) But thank you for expounding on the history.

I was just wondering if there was a way to reload specific virtual
server configuration files via the radmin tool, instead of reloading
*every* virtual server with a -HUP. I should have been clearer.

When some people say 'HUP' they're referring to HUP like behaviour,
not actually sending a process the HUP signal.
> HUP is a Unix signal, originally meaning "Hang Up" but since has
> been co-opted to mean "reload your configuration" when the signal is
> sent to a service (e.g. a daemon). Note, reload is significantly
> different than restart, during a reload the service continues to run
> whereas a restart the existing process is terminated and restarted.
> Unix signal are sent to a process via the kill() function or the
> kill command (historically signals were often used to kill a
> process, hence the name, however a better name might be
> send_signal(), but history lives on).
>
Thanks,
Arran

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