On Tue, 27 Aug 2013 11:00:00 +0200, Matthias Brugger said: > All of them try to execute init by invoking run_init_process. > So my question is, why does the rdinit= parameter exist, I suppose for > reasons of compatibility with older kernel versions. But why it is set > to "/init"?
Consider the case where you have an initrd that contains an "init" program that launches your system - but you also have a "busybox" program for rescue purposes. If things get hosed, you can 'rdinit=/busybox' to get into rescue mode. > Searching in the web, I found information saying that the first file, > the Linux kernel executes after boot is "/sbin/init". As far as I > understand that's not correct. It's semi-correct, in that /sbin/init is traditionally what gets launched after the initrd/initramfs has done its magic. Also, research the case where there is neither an initrd or initramfs provided.
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