201.2 Compiling a kernel - mkinitrd and mkinitramfs

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Re: 201.2 Compiling a kernel - mkinitrd and mkinitramfs

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Re: 201.2 Compiling a kernel - mkinitrd and mkinitramfs

On Wednesday 09 September 2009 09:47:59 Andy Goldschmidt wrote:
> Hi
> 
> What is the difference between mkinitrd and mkinitramfs ?
> 
> >From what I have read,  mkinitramfs seems to be the newer better one...
> 
> but I can't find out why its better...

initrd is the old method
initramfs is the new (current) method

It's not a question of which is better, it's a question of which is supported 
in recent kernels (recent being measured in terms of several years by now)

--

-- 
alan dot mckinnon at gmail dot com

Re: 201.2 Compiling a kernel - mkinitrd and mkinitramfs

Yes, ramdisk is the old method and ramfs is the new method
(Documentation/filesystems/ramfs-rootfs-initramfs.txt has a very good
explanation about "ram" disk/fs -- thanks Zhou), but I would say there
is no difference between mkinitrd and mkinitramfs.

mkinitrd (Red Hat-based) and mkinitramfs (Debian-based) will create
the initrd for the boot process, and they will use the "old" or "new"
method depending on the version.

Just be aware that mkinitrd from Red Hat and mkinitrd from Debian are
not the same! Here some links:

http://kernel-handbook.alioth.debian.org/ch-initrd.html
http://kernel-handbook.alioth.debian...initramfs.html
http://wiki.debian.org/InitrdReplacementOptions

Conclusion, use mkinitrd on Red Hat and mkinitramfs on Debian.

Ragards
Rodolfo Martínez

On Wed, Sep 9, 2009 at 3:03 AM, Alan McKinnon<alan.mckinnon <at> gmail.com> wrote:
> On Wednesday 09 September 2009 09:47:59 Andy Goldschmidt wrote:
>> Hi
>>
>> What is the difference between mkinitrd and mkinitramfs ?
>>
>> >From what I have read,  mkinitramfs seems to be the newer better one...
>>
>> but I can't find out why its better...
>
> initrd is the old method
> initramfs is the new (current) method
>
> It's not a question of which is better, it's a question of which is supported
> in recent kernels (recent being measured in terms of several years by now)
>
> --
> alan dot mckinnon at gmail dot com
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Boot Process

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Re: Boot Process

2009/9/9 Danny Spell <ddspell@...>:
> Where would I find some good documentation that would take me
> through the Linux bootup process?

Well, there are actually a number of resources on this, for example:

wikipedia:
http://en.wikipedia.org/wiki/Linux_startup_process
RedHat specific:
http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/ch-boot-init-shutdown.html
TLDP (might be dated):
http://tldp.org/HOWTO/From-PowerUp-To-Bash-Prompt-HOWTO.html

On the other hand, it's always nice to have a good and up-to-date
piece of documentation on this, especially if it can cover multiple
distributions (SYSV vs BSD init, etc).

mvg,
      Guus

Re: Boot Process

Am Mittwoch 09 September 2009 16:06:41 schrieb Danny Spell:
> Where would I find some good documentation that would take me through the
> Linux bootup process?

You can read boot manpage. 
$> man boot

> 
> 
> 
> What I'm looking for is the standard way a server does a coldstart bootup.
>  I realize that this may vary to some degree with the different
>  distributions, so if there are differences, it would be nice if the
>  documentation explained what they are. Regardless, if I had the process
>  for just one distribution, that would be great.
> 
> 
> 
> I'm an old timer, you see. Back in 1986, I got my start in IT with PRIMOS
> and I was taught how the system worked from coldstart. It was a great
> experience to learn about how the OS worked with the hardware to become a
> functioning system.
> 
> 
> 
> If there isn't a resource, then this would be a great blogging opportunity
> for someone out there, don't you think?
> 
> 
> 
> 
> 
> Thanks,
> 
> Danny
> 

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Re: Boot Process

2009/9/10 David Voge <mail@...>:
> Am Mittwoch 09 September 2009 16:06:41 schrieb Danny Spell:
>> Where would I find some good documentation that would take me through the
>> Linux bootup process?
>
> You can read boot manpage.
> $> man boot

Nice one, didn't know that existed.

mvg,
     Guus

Re: Boot Process

Am Donnerstag 10 September 2009 20:33:23 schrieb Guus Snijders:
> 2009/9/10 David Voge <mail@...>:
> > Am Mittwoch 09 September 2009 16:06:41 schrieb Danny Spell:
> >> Where would I find some good documentation that would take me through
> >> the Linux bootup process?
> >
> > You can read boot manpage.
> > $> man boot
> 
> Nice one, didn't know that existed.
> 
> 
> mvg,
>      Guus
> 

You can search for something if you use
$> apropos boot

greeting 
David

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Re: Boot Process

this got me thinking.  In general, who out there uses "info"?
ted

David Voge wrote:
>>> $> man boot
>> Nice one, didn't know that existed.
>>
>>
>> mvg,
>>      Guus
>>

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