osis on Ubuntu 14 LTS

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Install base system

osis=/osis1; debootstrap --arch i386 trusty $osis

copy locals

cp /etc/{timezone,localtime} $osis/etc

set host name

echo "local" > $osis/etc/hostname

setup network for dhcp

cat << eot > $osis/etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp
eot

Configure repositories

cat << eot > $osis/etc/apt/sources.list
###### Ubuntu Main Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse 

###### Ubuntu Update Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse 
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse 
deb http://us.archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse 
deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse 
eot

Create module directory and copy modules

mkdir -pv $osis/lib/modules; cp -r /lib/modules/$(uname -r) $osis/lib/modules/

Update dns setting, you do not want 127.0.0.1 to be your dns server !

nano $osis/etc/resolvconf/resolv.conf.d/original

chroot to base system

chroot $osis

create necessary directories

mkdir -p selinux

setup time zone and locals

locale-gen en_US.UTF-8; update-locale LANG=en_US.UTF-8; dpkg-reconfigure -u tzdata

Set the fstab
cat << eot >> etc/fstab devpts /dev/pts devpts nosuid,noexec,gid=5,mode=0620 0 0 tmpfs /dev/shm tmpfs nosuid,nodev,mode=0755 0 0 sysfs /sys sysfs nosuid,nodev,noexec 0 0 proc /proc proc nosuid,nodev,noexec 0 0 eot
Run updates and install nano editor

apt-get update; apt-get install nano

Create init script (very important) nano init Paste the following in init script

cat << eot > init
#!/bin/sh

# Mount file system in ram.
mount -a

# Setup init variable
init=/sbin/init

# Run the init 
exec \${init}
eot

Make init executable

chmod a+x init

Setup autologon

cat << eot >> etc/init/tty1.conf
# Autologin account
exec /bin/login -f root < /dev/tty1 > /dev/tty1 2>&1
eot

Run updates and upgrades

apt-get update; apt-get dist-upgrade -y

Install necessary software packages

apt-get install ssh dnsutils usbutils -y

exit out of chroot

exit

compress osis

cd $osis; find . -print0 | sudo cpio --null -ov --format=newc | gzip -9 > /var/www/html/ipxe/imgs/$osis.gz

OLD CONFIGURATION
osis core ubuntu 14.04 lts 32 bit global variable

osis=/osis

install core system

debootstrap --arch i386 trusty $osis

copy time setting

cp /etc/{timezone,localtime} $osis/etc

set hostname

echo "osis" > $osis/etc/hostname

setup network

setup autologin

echo "" >> $osis/etc/init/tty1.conf
echo "# Autologin account" >> $osis/etc/init/tty1.conf
echo "exec /bin/login -f root < /dev/tty1 > /dev/tty1 2>&1" >> $osis/etc/init/tty1.conf

copy modules

mkdir -p $osis/lib/modules; cp -fr /lib/modules/$(uname -r) $osis/lib/modules/

compress core system

cd $osis; find . -print0 | sudo cpio --null -ov --format=newc > ~/osis
xz -zv -9 -C crc32 ~/osis; cp ~/osis.xz /var/www/html/ipxe/imgs/

make boot kernel

sudo cp /boot/vmlinuz-$(uname -r) ~
cp -r /etc/initramfs-tools /etc/initramfs-pxe; nano /etc/initramfs-pxe/initramfs.conf

replace as
MODULES=most to MODULES=netboot, BOOT=local to BOOT=nfs, and DEVICE= to DEVICE=eth0

mkinitramfs -d /etc/initramfs-pxe -o ~/initrd.img-$(uname -r)
sudo cp ~/{vmlinuz-$(uname -r),initrd.img-$(uname -r)} /var/www/html/ipxe/