============================================== make boot ram
dd if=/vmlinuz of=/dev/fd0
/sbin/vidmode /dev/fd0 0
/sbin/ramsize /dev/fd0 1440
/sbin/rdev /dev/fd0 /vmlinuz
============================================== make boot noram
dd if=/vmlinuz of=/dev/fd0
/sbin/vidmode /dev/fd0 0
/sbin/ramsize /dev/fd0 0
/sbin/rdev /dev/fd0 /vmlinuz
==============================================  
  - run  echo image=<kernel_image>  |
      /sbin/lilo -C - -b /dev/fd0 -v -v -v
     If you've already installed LILO on your system, you might not want to
    overwrite your old map file. Use the  -m  option to specify an
    alternate map file name.
------------------------------------
In some cases*, it may be desirable to install LILO on a floppy disk in a
way that it can boot a kernel without accessing the hard disk.

  *  E.g. if no hard disk is accessible through the BIOS.

The basic procedure is quite straightforward (see also section "BIOS
restrictions"):

  - a file system has to be created on the file system
  - the kernel and boot.b have to be copied to the floppy disk
  - /sbin/lilo has to be run to create the map file

This can be as easy as

/sbin/mke2fs /dev/fd0
[ -d /fd ] || mkdir /fd
mount /dev/fd0 /fd
cp /boot/boot.b /fd
cp /zImage /fd
echo image=/fd/zImage label=linux |
  /sbin/lilo -C - -b /dev/fd0 -i /fd/boot.b -c -m /fd/map
umount /fd

The command line of /sbin/lilo is a little tricky.  -C -  takes the
configuration from standard input (naturally, one could also write the
configuration into a file),  -b /dev/fd0  specifies that the boot sector is
written to the floppy disk,  -i /fd/boot.b  takes the first and second
stage loaders from the floppy,  -c  speeds up the load process, and  -m
/fd/map  puts the map file on the floppy too.
============================================== single user mode
linux init=/bin/sh	boot single user mode
==============================================  
-----------------------------------