Qemu mounts Linux kernel and busybox root file systems

Grandma, a bear, got killed by a stupid error for several nights and did not compile it into a static file. After running it, the system prompts no init file.

In fact, the whole process is quite simple, that is, the details are not noticed. I have written a script (for reference only, work is not OK) for your reference:

#! /Bin/ Bash # In order not to affect others, create a directory for our work  Mkdir  Kerneldbgcd kerneldbg # Use the GIT Version Management System to download the Linux kernel source code. Git:  //  Git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git  # Use the GIT Version Management System to download the busybox source code git clone git:  //  Busybox.net/busybox.git  # Check whether qemu is installed in the system. If not, install dpkg. -L | Grep  Qemu If [$? EQ 1  ]  Echo   "  Please install qemu first!  "      Echo   "  Usage: sudo apt-Get install qemu  "  Fi  # Compile busybox first. Set busybox to static link before compilation. Otherwise, hum, kill you @ # You can manually set. CD busybox through make menuconfig  If [- F. config] Sed   "  Config_staic = y  " # Modify to static compilation. Code ! Else      Echo   "  Missing. config, please \ "make menuconfig \" first  "  Fi  # Compile busybox and install it. A _ install directory is generated under the current directory.  Make  Make   Install # Go To The Linux directory CD .. CD Linux - Stable # After necessary Configuration  Make  Bzimage # create a disk image  Dd   If =/Dev/Zero of = rootfs. img bs = 1 m COUNT = 20  # Format the disk mkfs. ext3 rootfs. IMG # create a rootfs directory to mount rootfs. img  Mkdir  Rootfs # Mount rootfs. img  Sudo   Mount - O loop rootfs. IMG rootfs # copy all the content in the _ install directory generated by busybox to the rootfs directory. # This is actually the so-called root file system. CP -RV./busybox/_ install /*  . /Rootfs # create the necessary device file CD rootfssudo mknod rootfs/dev/console C 5 1 sudo mknod rootfs/dev/Ram B 1 0 # copy the bzimage compiled by Linux to CD .. CP. /Linux-stable/ARCH/x86/boot/bzimage # Start qemu and load the generated root file system and Kernel File qemu-hda. /rootfs. IMG-kernel. /bzimage-APPEND "root =/dev/SDA"