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Old 12-21-2009, 07:09 PM   #1
Registered: Mar 2009
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What happens when linux starts?

Could someone do a breakdown for me?
What is the process that takes place when a distro like ubuntu starts?
after bios has handed off grub/lilo? what takes place?

If this is too large a subject I'd happily read anything you guys could reference me too also...
Old 12-21-2009, 07:13 PM   #2
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Grub legacy typically loads a couple of config files and then boots the linux kernel. For ubuntu, the kernel loads modules and services are supplied via Upstart, a replacement for the old sys V init systems.

So I'd start looking through Grub/lilo docs and then move on to the init systems.

I don't know much in the way of specifics, but look up Upstart to understand the event based boot up of ubuntu. Sys V Init is the old system still employed by many linux distributions. But most of them are moving to event based systems.
Old 12-21-2009, 07:14 PM   #3
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Old 12-21-2009, 07:16 PM   #4
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If I were you, I would start by booting a system then looking at the /var/log/messages log file. Some of the messages are a bit cryptic, but you should be able to get a pretty good idea of what is going on.



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