The Howto (and Howto-Not) Corner: Trimming down etch to ~100 MB

Trimming down etch to ~100 MB

The basic recepie:

sudo debootstrap etch etch/ ftp://ftp.ee.debian.org/debian
sudo chroot etch
apt-get install localepurge
apt-get --purge remove dselect aptitude dhcp3-client dhcp3-common info man-db manpages dmidecode laptop-detect
apt-get install grub initrd-tools linux-image-686 ssh python-minimal
mkdir /boot/grub; update-grub
apt-get clean
APT cache:
6.4M /var/cache/apt/pkgcache.bin
6.4M /var/cache/apt/srcpkgcache.bin
19M /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_etch_main_binary-i386_Packages
3.6M /var/lib/dpkg/info
internationalization:
6.9M /usr/share/i18n
4.9M /usr/lib/gconv
documentation:
8.2M /usr/share/doc
4.7M /usr/share/man
zoneinfo:
5.6M /usr/share/zoneinfo
kernel modules:
44M lib/modules/2.6.18-4-686/kernel
time for cleanup:

vi /etc/apt/sources.list, comment everything out. This will temporarily disable apt
apt-get update
rm /usr/share/i18n/{charmaps,locales}/*
rm -rf /usr/lib/gconv # or at least
for i in IBM INIS EBCDIC MAC ISO- ISO_ KOI JOHAB CP BIG5 EUC ECMA ARM ASM GEOR GOST GREEK LATIN NATS GB SJIS; do rm /usr/lib/gconv/${i}*; done
rm -rf /usr/share/{doc,man}/*
boot into the system and check what modules are actually in use with lsmod, remove the modules you don't need (e.g. who needs sound in a router? or even better, build your own kernel):
rm -rf /lib/modules/2.6.18-4-686/kernel/sound
rm -rf /lib/modules/2.6.18-4-686/kernel/drivers/isdn
rm -rf /lib/modules/2.6.18-4-686/kernel/drivers/net/wireless
rm -rf /lib/modules/2.6.18-4-686/kernel/drivers/media
rm -rf /lib/modules/2.6.18-4-686/kernel/drivers/scsi/pcmcia
version=2.6.18-4-686
depmod -a -F /boot/System.map-$version $version
update-initramfs -u # to check that nothing is broken
# other redundant modules:
/lib/modules/2.6.18-4-686/kernel/net/{ax25,ipx,x25,ipv6,appletalk,atm,bluetooth,decnet,econet,irda}
/lib/modules/2.6.18-4-686/kernel/fs/{reiserfs,smbfs,qnx4,xfs,befs,bfs,affs,afs,coda,cifs,freevxfs,hfs,hfsplus,hpfs,ocfs2,nfs,nfs_common,nfsd,ncpfs,ufs,udf}
# remove modules that you don't need from (spacehogs):
# /lib/modules/2.6.18-4-686/kernel/drivers/net
# /lib/modules/2.6.18-4-686/kernel/drivers/scsi
rm /lib/modules/2.6.18-4-686/kernel/drivers/scsi/sata*.ko
rm -rf /lib/modules/2.6.18-4-686/kernel/drivers/scsi/aic7xxx*

tzconfig
echo '127.0.0.1 localhost' > /etc/hosts # see http://www.howtoforge.com/perfect_setup_debian_etch_p3 for IPv6
echo 'my.hostname' > /etc/hostname
vi /etc/network/interfaces
iface lo inet loopback
...
vi /etc/fstab
#
proc /proc proc defaults 0 0
/dev/hda2 none swap sw 0 0
/dev/hda1 / ext3 defaults,errors=remount-ro 0 1
vi /etc/resolv.conf
nameserver x.x.x.x

set root password or add an ordinary user and install sudo
passwd
disable IPv6 if you don't need it
boot target with Knoppix, tomsrtbt or whatever other rescue tools you have
create a parition for the new system, mkfs, mount and cd to target root
transfer the filesystem:
nc -lp 5555 | tar xf - # in target system
cd etch; sudo tar cf - . | nc target 5555
In target: chroot .; grub-install /dev/hda OR if you are unable to run grub from the target, create a grub floppy:

dd if=/boot/grub/stage1 of=/dev/fd0 bs=512
dd if=/boot/grub/stage2 of=/dev/fd0 bs=512 seek=1
in grub shell:
root (hd0,0)
kernel /vmlinuz root=/dev/hda1 ro
initrd /initrd.img
boot
when booted into target, run grub install
if proc is not mounted, grub will complain Could Not Find Device For /boot,
mount proc /proc
cp /proc/mounts /etc/mtab
grub-install /dev/hda

ready, reboot target
update-locale LC_ALL=C LANG=C
setup /etc/iftab
update-alternatives --set editor /usr/bin/vim.tiny
apt-get install sudo; visudo
# or user ALL=(ALL) NOPASSWD: ALL
%admin ALL=(ALL) ALL

# posted by Marutosan @ 11:13 AM

Comments: Post a Comment

<< Home