Compile and install a small kernel

Preparation environment: host machine, target machine, Hard Disk

On the host machine:

First, prepare a hard disk SDB on the host machine. The size is 10 Gb. It is divided into two zones: sdb1 (50 m) and sdb2 (512 m ).

Format the disk

# mke2fs -t ext4 /dev/sdb1# mke2fs -t ext4 /dev/sdb2

Separate mounting

# mount /dev/sdb1 /mnt/boot/ # mount /dev/sdb2 /mnt/sysroot/

Create a grub File

# grub-install --root-directory=/mnt /dev/sdb

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# Cd/mnt/boot/edit the grub configuration file # Vim grub/grub. conf

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# cd /mnt/sysroot/

Create directory

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Edit # Vim/sbin/init

Echo-e "Welcome to Zhou \ 033 [33 med \ 033 [0 m Linux"
Mount-n-t proc/proc
Mount-n-t sysfs/sys
Mount-n-t devtmpfs NONE/dev
Mount-n-o remount, RW/dev/sda2/
/Bin/bash

Grant the execution permission

# chmod +x sbin/init

Run the script bincp. Sh Copy command:

[[Email protected] ~] # Bash bincp. Sh
Plz enter a command: Bash
Plz enter a command: Mount
Plz enter a command: umount
Plz enter a command: ls
Plz enter a command: Kill
Plz enter a command: ifconfig
Plz enter a command: Quit

 

Decompress the kernel

# tar xf linux-3.13.6.tar.xz# cd linux-3.13.6# make allnoconfig# make menuconfig

Kernel options to be manually selected
64-kit Kernel
Ceneral setup
--> Local version-append to kernel release
--> System V IPC
Enable loadable module support
--> Module unloading
Enable the block layer
--> Block layer SG support v4
Processor type and features
--> Hierarchical Ric multi-processing support
--> Processor family
--> Core 2/newer Xeon
--> Multi-core scheduler suppor
Bus options (pCI etc .)
--> PCI support
Executable file formats/emulations
--> Kernel support for elf Binaries
--> Kernel support for scripts starting #!
Networking Support
--> Networking options
--> TCP/IP networking
Device Drivers
--> Generic driver options
--> Maintain a devtmpfs filesystem to mount at/dev
--> Automount devtmpfs at/dev, after the kernel mounted the rootfs
--> SCSI Device Support
--> SCSI Device Support
--> SCSI disk support
--> Fusion MPT Device Support
--> Fusion MPT scsihost drivers for Spi
--> Fusion MPT logging facility
--> Network device support
--> Ethernet Driver Support
--> Intel Devices
--> Intel (r) Pro/1000 Gigabit Ethernet support
--> Intel (r) Pro/1000 PCI-Express Gigabit Ethernet support
--> Input Device Support
--> Mouse Interface
--> Keyboards
--> Mice
--> USB support
--> Xhci HCD (USB 3.0) Support
--> Ehci hcd (USB 2.0) Support
--> Ohci hcd (USB 1.1) Support
--> Uhci HCD (most intel and via) Support
File Systems
--> The extended 4 (ext4) filesystem

# make –j 4

Copy bzimage

# cp arch/x86/boot/bzImage /mnt/boot/

Then, put the disk into the target machine. Can the experiment be started normally?

 

# make menuconfig    # make -j 3       # make install             # cp _install/* /mnt/sysroot       # ls /mnt/sysroot/              clipboard[54] # cp /root/busybox-1.22.1/_install/* /mnt/sysroot/ -r

Create a root file system for the target.

# cd /mnt/sysroot # mkdir -pv boot dev etc/{rc.d,sysconfig,profile.d} home/{gentoo,fedora，test,}  proc root sys usr/{bin,sbin,local,lib,lib64} # chown gentoo.gentoo home/gentoo       # chown test.test  home/test # chown fedora.fedora home/fedora

Configuration File

# vim /mnt/boot/grub/grub.conf

Timeout 3
Default 0
Title nihao Linux
Root (hd0, 0)
Kernel/bzimage Ro root =/dev/sda2

Inittab of the physical console:
: Sysinit:/etc/rc. d/rc. sysinit
Console: respawn:-/bin/sh
: Ctrlaltdel:/sbin/reboot
: Shutdown:/bin/umount-a-r

Inittab on the user logon Interface
: Sysinit:/etc/rc. d/rc. sysinit
: Respawn:/sbin/Getty 19200 tty1
: Respawn:/sbin/Getty 19200 tty2
: Respawn:/sbin/Getty 19200 tty3
: Respawn:/sbin/Getty 19200 tty4
: Respawn:/sbin/Getty 19200 tty5
: Respawn:/sbin/Getty 19200 tty6
: Ctrlaltdel:/sbin/reboot
: Shutdown:/bin/umount-a-r

 

# vim /mnt/sysroot/etc/fstab           /dev/sda2 / ext4 defaults 0 0    /dev/sda1 /boot ext4 defaults 0 0    proc /proc proc defaults 0 0    sysfs /sys sysfs defaults 0 0

 

# vim /mnt/sysroot/etc/rc.d/rc.sysinit

#! /Bin/sh
#
Echo-e "Welcome to \ 033 [34mwukui \ 033 [0 m Linux"
Echo "remounting root filesystem"
Mount-n-o remount, RW/dev/sda2/
Echo "Mount all filesystem"
Mount-
Echo "create Device File"
Mdev-S
Echo "set hostname is $ hostname"
[-R/etc/sysconfig/network] & source/etc/sysconfig/Network
[-Z "$ hostname"] & hostname $ hostname | hostname localhost
Export PS1 = '[\ [email protected] \ H \ W] \ $'

 

# vim  /mnt/sysroot/etc/passwd

Root: X: 0: 0: Root:/root:/bin/sh
Fedora: X: 501: 501:/home/Fedora:/bin/sh
Test: X: 502: 502:/home/test:/bin/sh

# Vim/mnt/sysroot/etc/group
Root: X: 0:
Fedora: X: 501:
Test: X: 502:
# OpenSSL passwd-1-salt 'openssl rand-hex 4'
Password:
$1 $ fc73284e $ q/ntg8fkysasdbzjp/sakjo

# Vim/mnt/sysroot/etc/shadow
Root: $1 $ fc66576e $ q/ntg4okyue0bzjp/uh4t0: 16272: 0: 99999: 7 :::
Fedora: $1 $ fc66576e $ q/ntg4okyue0bzjp/uh4t0: 16302: 0: 99999: 7 :::
Test: $1 $ fc66576e $ q/ntg4okyue0bzjp/uh4t0: 16302: 0: 99999: 7 :::
# Chmod 600/mnt/sysroot/etc/shadow
# Vim/mnt/sysroot/etc/sysconfig/Network
Hostname = mylinux
 

Provide dropbaer
Compile

#./Configure -- prefix =/usr/local/dropbear
# Make Programs = "dropbear dbclient dropbearkey dropbearconvert SCP"
# Make Programs = "dropbear dbclient dropbearkey dropbearconvert SCP" Install
# Cd/usr/local/dropbear/
# Ls bin/
Clipboard [55]


# Ls sbin/

Key File

# Bin/dropbearkey-t dss-F/etc/dropbear/dropbear_dss_host_key # bin/dropbearkey-t rsa-s 2048-F/etc/dropbear/dropbear_rsa_host_key # ll/etc/dropbear/ clipboard [57] # sbin/dropbear-P 22022-e-f front-end clipboard [58] # SS-tnlp | grep 22022 clipboard [59] Test clipboard login in xshell [60] start porting # Path =/usr/local/dropbear/bin /: /usr/local/dropbear/sbin /: $ PATH clipboard [61] clipboard [62] # mkdir/mnt/sysroot/etc/dropbear # dropbearkey-t dss-F/mnt/sysroot/etc/dropbear/dropbear_dss_host_key # dropbearkey- t RSA-s 2048-F/mnt/sysroot/etc/dropbear/dropbear_rsa_host_ke # mkdir-PV/mnt/sysroot/var/run dropbear # cp/etc/shells/mnt/sysroot /etc # echo/bin/ash>/mnt/sysroot/etc/shellsdropbare nsswitch dependent on at startup # cp/etc/nsswitch. conf/mnt/sysroot/etc # cp-a-d/usr/lib64/libnsspem. so/usr/lib64/libnsssysinit. so/usr/lib64/libnssutil3.so/mnt/sysroot/usr/lib64 # cp-a-d/lib64/libnss_files */mnt/sysroot/lib64 # cp-a-d/usr /lib64/libnss3.so/usr/lib64/libnss_files.so/mnt/sysroot/usr/lib64 automatic mounting upon startup # echo "devets/dev/PTS devpts gid = 5, mode = 620 0 0 ">/mnt/etc/fstab # Vim/mnt/sysroot/etc/rc. d/RC. sysinit mkdir/dev/PTS placed in front of Mount-a clipboard [63] # Vim/mnt/sysroot/etc/rc. d/RC. sysinit/sbin/ifconfig lo 127.0.0.1 netmask 255.0.0.0/sbin/ifconfig eth0 192.168.127.53 netmask 255.255.255.0 export Path =/usr/local/dropbear/bin:/usr/local/dropbear/sbin: $ path/usr/local/dropbear/sbin/dropbear-P 22

Compile and install a small kernel