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Cut down Linux (Debian)
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Michael Schnell
*nix forums Guru Wannabe


Joined: 21 Feb 2005
Posts: 110

PostPosted: Sun Jul 09, 2006 9:02 am    Post subject: Re: Cut down Linux (Debian) Reply with quote
Quote:
I'm working on a firewall/NAT router project using Debian Sarge 3.1.....


Why not starting with the fli4l project instead ? They do an extremely
small distribution for x86 especially tailored for routers.

-Michael
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markp
*nix forums beginner


Joined: 07 Jul 2006
Posts: 7

PostPosted: Sat Jul 08, 2006 2:35 pm    Post subject: Re: Cut down Linux (Debian) Reply with quote
"Ulli Hochholdinger" <calvin@akk.org> wrote in message
news:e8nlm1$3av$1@news2.rz.uni-karlsruhe.de...
Quote:
markp <map.nospam@f2s.com> wrote:
Hi All,
Is this a sensible approach and is there an easy way to do this cutting
down? Would another init replacement, like runit, be better? I don't
really
know enough yet to build it up from scratch and I really need the
firewall
installed soon!
I used another way to strip down a normal debian installation:
- Create a normal debian install in a chroot-environment (install only
necessary packages).
- Use a shell script which copies only the really necessary things on the
cf-disk (use rsync for this)
* no doc info and so on
* no /var/lib/dpkg
* keep out everything that is big and not used (use "du" and "sort" to
get info of the biggest things)

So you have a normal debian install in a chroot (which is about 300MB)
this
can be kept updated when necessary. And you have a script to strip this
down to the CF-disk. You dont need any new init-method.
Oh and my CF-image is about 80MB in the end.

Gruss

Thanks, I'll give it a go!

Mark.
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Ulli Hochholdinger
*nix forums beginner


Joined: 15 May 2005
Posts: 3

PostPosted: Sat Jul 08, 2006 7:08 am    Post subject: Re: Cut down Linux (Debian) Reply with quote
markp <map.nospam@f2s.com> wrote:
Quote:
Hi All,
Is this a sensible approach and is there an easy way to do this cutting
down? Would another init replacement, like runit, be better? I don't really
know enough yet to build it up from scratch and I really need the firewall
installed soon!
I used another way to strip down a normal debian installation:

- Create a normal debian install in a chroot-environment (install only
necessary packages).
- Use a shell script which copies only the really necessary things on the
cf-disk (use rsync for this)
* no doc info and so on
* no /var/lib/dpkg
* keep out everything that is big and not used (use "du" and "sort" to
get info of the biggest things)

So you have a normal debian install in a chroot (which is about 300MB) this
can be kept updated when necessary. And you have a script to strip this
down to the CF-disk. You dont need any new init-method.
Oh and my CF-image is about 80MB in the end.

Gruss
Ulli

--
\ E-Mail: calvin@akk.org \
/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ /
\ Sometimes I think the surest sign that intelligent life exists elsewhere \
/ in the universe is that none of it has tried to contact us. (calvin) /
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markp
*nix forums beginner


Joined: 07 Jul 2006
Posts: 7

PostPosted: Fri Jul 07, 2006 9:58 pm    Post subject: Cut down Linux (Debian) Reply with quote
Hi All,

I'm working on a firewall/NAT router project using Debian Sarge 3.1.
Currently I have a hard disk based system, but I'd like it to run with a
128Mbyte CF card in a mini-ITX box. The firewall is working, but the
standard installation system is a little on the large side.

Someone suggested I could replace the init process with a user script and
only load those things I need, but init enables quite a few facilities, like
gracefully shutting down/ booting up, gettys etc., so I'd like to keep it
but maybe reduce the number of scripts run in /etc/rcS.d, and /etc/rc2.d
directories, and then remove all the packages and files I don't want.

Is this a sensible approach and is there an easy way to do this cutting
down? Would another init replacement, like runit, be better? I don't really
know enough yet to build it up from scratch and I really need the firewall
installed soon!

Thanks, any hints/suggestions would be gratefully received.

Mark.
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