Build a mini Linux from scratch (4)

16. Compiling BusyBox

17. Provide Inittab file

18. Provide initialization scripts

19. Seventh Test Start

16. Compiling BusyBox

BusyBox Introduction BusyBox is a software that integrates more than 100 of the most commonly used Linux commands and tools.    BusyBox includes simple tools such as LS, Cat, Echo, and more, and includes larger, more complex tools such as grep, find, Mount, and Telnet. Some people call BusyBox the Swiss Army Knife in the Linux tool.  Simply speaking, BusyBox is like a big toolbox, which integrates many of the tools and commands that have been built into Linux, as well as the self-contained shell of the Android system. ---source Baidu Encyclopedia

[Email protected] ~]# tar xf busybox-1.22.1.tar.bz2 [[email protected] ~]# CD Busybox-1.22.1[[email protected] busybox-1. 22.1]# less install[[email protected] busybox-1.22.1]# make menuconfig//statically compile BusyBox Settings--->build Options---&  Gt [*] Build BusyBox as a static binary (no shared libs) installation Options ("Make Install" behavior)---> (./_install) Bus Ybox installation prefix [[email protected] busybox-1.22.1]# make && make install

Delete the directory under/mnt/sysroot and restart the test from the beginning

[Email protected] busybox-1.22.1]# rm-rf/mnt/sysroot/*

[[email protected] busybox-1.22.1]# ls _install/bin linuxrc sbin usr//file generated after successful compilation [[email protected] busybox-1.22.1]# C P-a _install/*/mnt/sysroot/[[email protected] busybox-1.22.1]# ls/mnt/sysroot/bin linuxrc sbin usr

Simple test

[[email protected] ~]# chroot/mnt/sysroot/chroot:failed to run command '/bin/bash ': No such file or Directory[[email Pro Tected] ~]# chroot/mnt/sysroot//bin/ash/#//most commands executed successfully

Create the appropriate directory

[[email protected] sysroot]# MKDIR-PV etc lib lib64 proc Sys Dev Root home boot mnt media tmp var

17. Provide Inittab file

BusyBox provides/sbin/init files, we can manually write the init configuration file/etc/inittab file (refer to the CentOS 5 series)

[[email protected] sysroot]# VIM Etc/inittab//Note is relative path:: Sysinit:/etc/rc.d/rc.sysinitconsole::respawn:-/bin/ash:: Ctrlaltdel:/sbin/reboot::shutdown:/bin/umount-a-R

18. Provide initialization scripts

[Email protected] sysroot]# mkdir etc/rc.d/[[email protected] sysroot]# vim etc/rc.d/rc.sysinit#!/bin/ash#echo-e "\  Twelcome to Sxj \033[32mmini\033[0m Linux "mount-t proc proc/procmount-t sysfs sysfs/sysmount-o remount,rw/dev/sda2 Add Execute permissions [[email protected] sysroot]# chmod +x etc/rc.d/rc.sysinit

19. Seventh Test Start

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Started successfully, and most of the commands are available

This article is from the "Homecoming" blog, make sure to keep this source http://sixijie123.blog.51cto.com/11880770/1881795

Build a mini Linux from scratch (4)