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In the /etc/rc5.d directory there are example 2 shells to be executed on boot. S02dbus-1 and S20syslog. From my understanding S02dbus-1 will be executed first. Now if I take a look at the shell script of S02dbus-1 the header says # Required-Start: $remote_fs $syslog. Does this mean syslog should already be running in order to start the dbus script ? If this is the case how come syslog will be executed after dbus ? Is there also an easy way to visualise the boot process ? So I can easily see which scripts get executed when and when scripts are executed in parallel.

  • You are assuming that that is your boot process. Depending from the operating system, these may have nothing to do with it at all. You need to explain in the question how you know that you are using van Smoorenburg rc, or at the very least mention the name and version of the operating system. – JdeBP Jul 20 '18 at 11:58
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Bootchart can help you visualize your boot process, outputting graphs that show which processes start when and where they are running in parallel. Here is an example of a bootchart diagram: A Bootchart

The project provides a nice basic guide to help users get started.

Depending on your system, the startup order may not follow the names of the /etc/rc files at all, as this behavior is often determined by the rc system, which is conventionally invoked at /etc/init.d/rc. For example, a system using startpar and insserv would determine boot order from the /etc/init.d/.depend.[boot|start|stop] files.

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