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Old 04-18-2004, 07:49 PM   #1
Registered: Apr 2004
Location: Argentina
Distribution: Mandrake 10
Posts: 61

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What do INITs mean?

I am new to this forum which I found of great help for a newbie like me! Thanks to you all for your cooperation.

The distro I am trying is Mandrake 10 and I am writing from Argentina.

One of my doubts (I have many but will try to ask them one at the time) is:

What are INITs (init 2; init 3; etc) and what are they used for?

As far as I understood, they are accessing levels. For instance, to install the nvidia driver I followed instructions telling me to type init 2 in order to install it. After that I went back to init 5.

Well, any easy explanation for a newbie will be very welcome.

Old 04-18-2004, 08:04 PM   #2
Registered: Mar 2004
Location: US
Distribution: Redhat 9 - Linux 2.6.3
Posts: 836

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init 0-6 correspond to the different runlevels.

init 1 is single user mode(root)
init 3 is maintenance mode.
and 5 is the graphical+networking+whatever else,

these can be veiwed by looking through init.d files, depending on your distros directory format.
Old 04-18-2004, 08:11 PM   #3
Registered: Nov 2003
Location: Vancouver, Canada
Distribution: Currently FC3
Posts: 342

Rep: Reputation: 30
The init is a program that init-ializes the operating system. It runs during the boot-up. I'm not sure what init 1, 2, 3 or 5 is. I know what runlevels 1,2,3 and 5 are, though. Runlevel 1 is single-user mode [only the most basic system services initialized and a root shell opened], runlevels 2 and 3 are multi-user modes (with or without NFS) [everything initialized, but only the text prompt is opened], runlevel 5 is graphical mode [all servers and services started, goes into graphical login screen]. You can configure /etc/inittab to boot into either one of these runlevels. Maybe this is what it means, though I'm not sure.

<edit> Didn't see the previous post when I wrote this. </edit>

Last edited by mbegovic; 04-18-2004 at 08:12 PM.
Old 04-18-2004, 08:21 PM   #4
Registered: Sep 2003
Location: Arizona
Distribution: Kubuntu 8.04
Posts: 202

Rep: Reputation: 30
Here is an article that explains run levels and other information about the Linux boot process. I had bookmarked it and had found it to be helpful.
Old 04-19-2004, 05:45 AM   #5
Registered: Apr 2004
Location: Argentina
Distribution: Mandrake 10
Posts: 61

Original Poster
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Thanks for the help

Thank you for the help. It was very useful.


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