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	<id>https://rivendellaudio.wiki/index.php?action=history&amp;feed=atom&amp;title=Rivendell_daemons</id>
	<title>Rivendell daemons - Revision history</title>
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	<updated>2026-04-23T14:47:56Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://rivendellaudio.wiki/index.php?title=Rivendell_daemons&amp;diff=28878&amp;oldid=prev</id>
		<title>imported&gt;WaybackImport: Imported from Wayback via edit</title>
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		<updated>2022-05-24T21:21:10Z</updated>

		<summary type="html">&lt;p&gt;Imported from Wayback via edit&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Rivendell has several daemons that run in the background helping things work.  &lt;br /&gt;
&lt;br /&gt;
The daemons can either be started during system boot up, via the /etc/&amp;#039;&amp;#039;&amp;#039;init.d&amp;#039;&amp;#039;&amp;#039; script, or they can be started as needed by the Rivendell programs using [http://en.wikipedia.org/wiki/Pluggable_Authentication_Modules PAM].  In the latter case, where the daemons are started as needed, the &amp;#039;&amp;#039;&amp;#039;pam_rd&amp;#039;&amp;#039;&amp;#039; PAM module can be used to ensure any old instances of the daemons are cleared out when a user logs in.&lt;br /&gt;
&lt;br /&gt;
The order the daemons start is important, as they depend on one another.  Here they are listed with the top most items started first:&lt;br /&gt;
&lt;br /&gt;
* 1) &amp;#039;&amp;#039;&amp;#039;jackd&amp;#039;&amp;#039;&amp;#039; [&amp;#039;&amp;#039;&amp;#039;optional&amp;#039;&amp;#039;&amp;#039;] (the jack audio connection kit daemon which allows for routing of audio from one application to another, only used if using the jack audio subsystem)&lt;br /&gt;
* 2) &amp;#039;&amp;#039;&amp;#039;caed&amp;#039;&amp;#039;&amp;#039; (the core audio engine daemon, which reads the audio files and plays them to the sound card)&lt;br /&gt;
* 3) &amp;#039;&amp;#039;&amp;#039;ripcd&amp;#039;&amp;#039;&amp;#039; (the rivendell interprocess communication daemon)&lt;br /&gt;
* 4) &amp;#039;&amp;#039;&amp;#039;rdcatchd&amp;#039;&amp;#039;&amp;#039; (a daemon to run batch jobs capturing and sending out audio)&lt;br /&gt;
* And then finall the Rivendell Applications can start (ex: rdairplay, rdlibrary)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
[[Image:Rivendell_daemons.jpg]]&lt;br /&gt;
&lt;/div&gt;</summary>
		<author><name>imported&gt;WaybackImport</name></author>
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