noreplace-paravirt
nosmp noapic nolapic clocksource=pit

270行目
kexec -l /mnt/vmlinuz --append="root=UUID=$(blkid|grep "$device:"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro $a noreplace-paravirt nosmp noapic nolapic clocksource=pit" --initrd=/mnt/initrd.img

279行目
kexec -l /mnt/boot/$(ls /mnt/boot -1|grep vmlinuz|tail -n1) --append="root=UUID=$(blkid|grep "$device:"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro $a noreplace-paravirt nosmp noapic nolapic clocksource=pit" --initrd=/mnt/boot/initrd.img-$(ls /mnt/boot -1|grep vmlinuz|tail -n1|cut -c9-)

Failed to execute /init


BusyBox v1.13.3(ubuntu 1:1.13.3-1ubuntu7) built-in shell(ash)
Enter 'help' for list of built-in commands

#[1.648120] usb 1-4: new high speed USB device using ehci_hcd and address 2
[1.782719] usb 1-4: configuratin #1 chosen from 1 choice
[1.892116] usb 4-1: new full speed USB device using uhci_hcd and address 2
[2.046107] usb 4-1: configuratin #1 chosen from 1 choice
#

title Ubuntu9.10-1
find --set-root /vmlinuz-2.6.31-20-generic
kernel /vmlinuz-2.6.31-20-generic  root=UUID=b3109f56-50fe-4d6b-b38f-e1660667c1e4 ro noreplace-paravirt nosmp noapic nolapic clocksource=pit rootdelay=90
initrd /test-1-initrd.img
boot

title Ubuntu9.10-2
find --set-root /vmlinuz-2.6.31-20-generic
kernel /vmlinuz-2.6.31-20-generic  root=UUID=b3109f56-50fe-4d6b-b38f-e1660667c1e4 ro noreplace-paravirt nosmp noapic nolapic clocksource=pit rootdelay=90
initrd /test-2-initrd.img
boot

#!/bin/sh

[ -d /dev ] || mkdir -m 0755 /dev
[ -d /root ] || mkdir -m 0700 /root
[ -d /sys ] || mkdir /sys
[ -d /proc ] || mkdir /proc
[ -d /tmp ] || mkdir /tmp
mkdir -p /var/lock
mount -t sysfs -o nodev,noexec,nosuid none /sys 
mount -t proc -o nodev,noexec,nosuid none /proc 

grep -q '\<quiet\>' /proc/cmdline || echo "Loading, please wait..."

# Note that this only becomes /dev on the real filesystem if udev's scripts
# are used; which they will be, but it's worth pointing out
mount -t tmpfs -o mode=0755 udev /dev
[ -e /dev/console ] || mknod -m 0600 /dev/console c 5 1
[ -e /dev/null ] || mknod /dev/null c 1 3
> /dev/.initramfs-tools
mkdir /dev/.initramfs

# Export the dpkg architecture
export DPKG_ARCH=
. /conf/arch.conf

# Set modprobe env
export MODPROBE_OPTIONS="-qb"

# Export relevant variables
export ROOT=
export ROOTDELAY=
export ROOTFLAGS=
export ROOTFSTYPE=
export IPOPTS=
export break=
export init=/sbin/init
export quiet=n
export readonly=y
export rootmnt=/root
export debug=
export panic=
export blacklist=
export resume_offset=

# Bring in the main config
. /conf/initramfs.conf

. /scripts/functions

# Parse command line options
for x in $(cat /proc/cmdline); do
    case $x in
    init=*)
        init=${x#init=}
        ;;
    root=*)
        ROOT=${x#root=}
        case $ROOT in
        LABEL=*)
            ROOT="${ROOT#LABEL=}"

            # support / in LABEL= paths (escape to \x2f)
            case "${ROOT}" in
            *[/]*)
            if [ -x "$(command -v sed)" ]; then
                ROOT="$(echo ${ROOT} | sed 's,/,\\x2f,g')"
            else
                if [ "${ROOT}" != "${ROOT#/}" ]; then
                    ROOT="\x2f${ROOT#/}"
                fi
                if [ "${ROOT}" != "${ROOT%/}" ]; then
                    ROOT="${ROOT%/}\x2f"
                fi
                IFS='/'
                newroot=
                for s in $ROOT; do
                    if [ -z "${newroot}" ]; then
                        newroot="${s}"
                    else
                        newroot="${newroot}\\x2f${s}"
                    fi
                done
                unset IFS
                ROOT="${newroot}"
            fi
            esac
            ROOT="/dev/disk/by-label/${ROOT}"
            ;;
        UUID=*)
            ROOT="/dev/disk/by-uuid/${ROOT#UUID=}"
            ;;
        /dev/nfs)
            [ -z "${BOOT}" ] && BOOT=nfs
            ;;
        esac
        ;;
    rootflags=*)
        ROOTFLAGS="-o ${x#rootflags=}"
        ;;
    rootfstype=*)
        ROOTFSTYPE="${x#rootfstype=}"
        ;;
    rootdelay=*)
        ROOTDELAY="${x#rootdelay=}"
        case ${ROOTDELAY} in
        *[![:digit:].]*)
            ROOTDELAY=
            ;;
        esac
        ;;
    resumedelay=*)
        RESUMEDELAY="${x#resumedelay=}"
        ;;
    loop=*)
        LOOP="${x#loop=}"
        ;;
    loopflags=*)
        LOOPFLAGS="-o ${x#loopflags=}"
        ;;
    loopfstype=*)
        LOOPFSTYPE="${x#loopfstype=}"
        ;;
    cryptopts=*)
        cryptopts="${x#cryptopts=}"
        ;;
    nfsroot=*)
        NFSROOT="${x#nfsroot=}"
        ;;
    netboot=*)
        NETBOOT="${x#netboot=}"
        ;;
    ip=*)
        IPOPTS="${x#ip=}"
        ;;
    boot=*)
        BOOT=${x#boot=}
        ;;
    resume=*)
        RESUME="${x#resume=}"
        ;;
    resume_offset=*)
        resume_offset="${x#resume_offset=}"
        ;;
    noresume)
        noresume=y
        ;;
    panic=*)
        panic="${x#panic=}"
        case ${panic} in
        *[![:digit:].]*)
            panic=
            ;;
        esac
        ;;
    quiet)
        quiet=y
        ;;
    ro)
        readonly=y
        ;;
    rw)
        readonly=n
        ;;
    debug)
        debug=y
        quiet=n
        exec >/dev/.initramfs/initramfs.debug 2>&1
        set -x
        ;;
    debug=*)
        debug=y
        quiet=n
        set -x
        ;;
    break=*)
        break=${x#break=}
        ;;
    break)
        break=premount
        ;;
    blacklist=*)
        blacklist=${x#blacklist=}
        ;;
    esac
done

if [ -z "${noresume}" ]; then
    export resume=${RESUME}
else
    export noresume
fi

depmod -a

# export BOOT variable value for compcache,
# so we know if we run from casper
export BOOT

# Don't do log messages here to avoid confusing usplash
run_scripts /scripts/init-top

log_begin_msg "Loading essential drivers..."
load_modules
log_end_msg

[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-premount"
run_scripts /scripts/init-premount
[ "$quiet" != "y" ] && log_end_msg

[ -d /mnt ] || mkdir -m 0755 /mnt
echo ==========================
echo "Please wait until all the device you want to boot is recognized and then push ENTER key."
echo ==========================
read a
deviceslist=$(blkid|cut -d: -f1)
okdeviceslist=""
for a in $deviceslist
do
  umount -l /mnt 2>/dev/null
  mount -t auto $a /mnt 2>/dev/null || continue
  if [ -e /mnt/vmlinuz -a -e /mnt/initrd.img ]
  then
    okdeviceslist="${okdeviceslist} $a"
  elif [ -n $(ls /mnt/boot/ -1 2>/dev/null|grep vmlinuz) ]
  then
    if [ -e /mnt/boot/initrd.img-$(ls /mnt/boot -1|grep vmlinuz|tail -n1|cut -c9-) ]
    then
      okdeviceslist="${okdeviceslist} $a"
    fi
  fi
  umount -l /mnt 2>/dev/null
done
i=0
echo ==========================
echo "The device file names and information of partitions will be recognized and are shown below."
echo
for a in ${okdeviceslist}
do
  echo $i":"$(blkid|grep "${a}:")
  i=$(expr $i + 1)
done
echo
echo "Please type the number of the device file name of the root partition of Ubuntu you want to boot."
while [ a = a ]
do
  read a
  if [ $a -ge 0 ]
  then
    if [ $? = 1 ]
    then
      echo "Please type number"
      continue
    elif [ $a -lt $(echo ${okdeviceslist}|tr ' ' '\n'|wc -l) ]
    then
      break
    else
      echo "Please type number smaller than $(echo ${okdeviceslist}|tr ' ' '\n'|wc -l)"
      continue
    fi
    echo "Please type number larger than 0 or 0"
  fi
done
device=$(echo ${okdeviceslist}|cut -d" " -f $(expr $a + 1))
echo "You selected $a:$device"
mount -t auto $device /mnt
if [ -e /mnt/vmlinuz -a -e /mnt/initrd.img ]
then
echo "Please enter commandline parameter to pass to kernel except root=... and ro"
  echo "Please type y If you want to boot with root=... ro noreplace-paravirt nosmp noapic nolapic clocksource=pit"
  read a
  if [ "$a" = "y" ]
  then
    a="noreplace-paravirt nosmp noapic nolapic clocksource=pit"
  fi
  kexec -l /mnt/vmlinuz --append="root=UUID=$(blkid|grep "$device"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro $a" --initrd=/mnt/initrd.img
  kexec -e
  exit 0
elif [ -n $(ls /mnt/boot/ -1 2>/dev/null|grep vmlinuz) ]
then
  if [ -e /mnt/boot/initrd.img-$(ls /mnt/boot -1|grep vmlinuz|tail -n1|cut -c9-) ]
  then
    echo "Please enter commandline parameter to pass to kernel except root=... and ro"
    echo "Please type y If you want to boot with root=... ro noreplace-paravirt nosmp noapic nolapic clocksource=pit"
    read a
    if [ "$a" = "y" ]
    then
      a="noreplace-paravirt nosmp noapic nolapic clocksource=pit"
    fi
    kexec -l /mnt/boot/$(ls /mnt/boot -1|grep vmlinuz|tail -n1) --append="root=UUID=$(blkid|grep "$device"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro $a" --initrd=/mnt/boot/initrd.img-$(ls /mnt/boot -1|grep vmlinuz|tail -n1|cut -c9-)
    kexec -e
    exit 0
  fi
fi
umount -l /mnt
echo "DAMESSU! Please push ENTER key"
read a
shutdown -r now
exit 0