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I just realized, that every serverprocess ends with a d? Like:

  • Apache: httpd
  • MySQL : mysqld
  • Unreal IRC : unrealircd

Why is this? Is there any reason, or is it to recognize them from each other?

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up vote 4 down vote accepted

It's a convention for programs that run in the background to perform a task.

It means Daemon - inspired by Maxwell's Daemon, an imaginary creature from the world of physics charged with reversing entropy by sorting molecules.

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Unix's answer to a Windows Service? – Frederik Spang Mar 17 '13 at 14:02
    
Essentially the same arrangement, yes. Daemons are usually started by "init", the first process to start on a Unix system. – Adrian Mar 17 '13 at 14:05
    
I see. Thank you! – Frederik Spang Mar 17 '13 at 14:07

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