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In this section, we will be building the actual boot disk and root
disk floppies. Lines preceded by
bash# indicate a shell
command and lines starting with
grub> indicate a
command typed within the grub shell.
Insert a blank diskette labeled "boot disk".
It may be necessary to erase the "blank" diskette if it comes factory pre-formatted for another, non-Linux operating system. This can be done using the command dd if=/dev/zero of=/dev/fd0 bs=1k count=1440
Get the GRUB source code from ftp://alpha.gnu.org/gnu/grub/
and unpack it into the
Configure and build the GRUB source code for an i386 processor by using the following commands:
bash# cd /usr/src/grub-0.95 bash# export CC="gcc -mcpu=i386" bash# ./configure --host=i386-pc-linux-gnu --without-curses bash# make
Normally, after compiling source code, one would use the command make install to copy the finished files to their proper destinations in the filesystem. However, using make install does not work well with small media like the floppy disks we are using. The problem is that there are many files in a package besides the actual binaries that get the job done. For example, there are often man or info pages that provide documentation. These extra files can take up more space than we can spare on the diskette. We can work around this limitation by copying essential files manually rather than using make install.
For GRUB to boot we will need to copy the stage1 and stage2
bootloader files to the
/boot/grub directory on the
Once the bootloader's files are copied to the boot disk we can enter the grub shell to finish the installation.
The steps for building the kernel were tested using Linux kernel version 2.4.26 and should work any 2.4.x or 2.6.x kernel. The latest version of the kernel source code may be downloaded from http://www.kernel.org/ or one of its mirrors.
The instructions below are very brief and are intended for someone who has previous experience building custom kernels. A more detailed explanation of the kernel building process can be found in the Kernel Rebuild Guide by Kwan Lowe.
Be sure to configure support for the following:
Console on virtual terminal (2.4.x kernels only)
RAM disk with a default size of 4096K
Second extended (ext2) filesystem
Insert a blank diskette labeled "root disk".
Get the bash-3.0 source code package from ftp://ftp.gnu.org/gnu/bash/
and untar it into the
Build BASH for an i386 CPU with the following commands:
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