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-   -   What happens when linux starts? (https://www.linuxquestions.org/questions/linux-newbie-8/what-happens-when-linux-starts-777329/)

cynicalpsycho 12-21-2009 07:09 PM

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...

pljvaldez 12-21-2009 07:13 PM

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.

worm5252 12-21-2009 07:14 PM

http://www.ibm.com/developerworks/li...y/l-linuxboot/

AsusDave 12-21-2009 07:16 PM

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.

HTH
Dave


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