Customizing the Linux kernel and compiling busybox

Download kernel:https://www.kernel.org/

Download busybox:http://www.busybox.net/

Download the home directory unzip the source package into the/USR/SRC directory:

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to create a soft connection in the /usr/src directory:

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Prepare the compilation environment:

Yum Install package group "Serverplatform development" and "Development tools"

Yum Groupinstall "Server Platform Development" "Development tools"

Execute make Allnoconfig in the Linux directory to clear all kernel options and then execute make Menuconfig

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after opening the configuration interface according to your own hardware to choose the appropriate driver, to support the CPU, support multi-threading, support SCSI interface, support file system, support TCP/IP protocol stack, support keyboard and other linear devices, Choose according to your own needs.

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Select OK to save exit, execute makebzimage compile kernel available –j # turn on multi-line compilation faster

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compile busybox:

Cd/usr/src/busybox

Make Menuconfig

Enter the configuration interface selected Busybox Settings--->build Options---> buildbusybox as a static binary (no shared libs)

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The remaining options can be maintained by default.

Yum install glibc-static Pack

Yuminstall glibc-static then perform make compilation BusyBox

prepare the second hard drive and put the compiled kernel and busybox into the specified directory

The second drive is divided into two zones to make Ext4 file systems and mount them under/mnt/boot and /mnt/sysroot :

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Mkfs-t ext4/dev/sdb1 Creating a file system

Mkfs-t ext4/dev/sdb2 Creating a file system

Mkdir/mnt/boot Creating a directory

Mkdir/mnt/sysroot Creating a directory

Mount/dev/sdb1/mnt/boot Mount Partition 1

Mount/dev/sdb2/mnt/sysroot Mount Partition 2

to create grub for the second hard drive :

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Copy the kernel to /dev/sdb1,busybox copy to /dev/sdb2 and create the necessary directories

Cp/usr/src/linux/arch/x86/boot/bzimage/mnt/boot

cp/usr/src/busybox/_install/*/mnt/sysroot

Create a grub.conf file

Vim/mnt/boot/grub/grub.conf

The contents are as follows:

Default=0

Timeout=5

Title Mylinux

Root (hd0,0)

Kernel/bzimage ro Root=/dev/sda2init=/sbin/init

Create a inittab file vim/mnt/sysroot/etc/inittab

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Create a rc.sysinit file vim/mnt/sysroot/etc/rc.d/rc.sysinit

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Customizing the Linux kernel and compiling busybox