第四章 配置系统让系统可以启动1、LFS-引导脚本
cd /sources
tar xvf lfs-bootscripts-20200818.tar.xz
cd lfs-bootscripts-20200818
make install
cd ..
rm -rf lfs-bootscripts-202008182、 创建自定义 udev 规则：
bash /lib/udev/init-net-rules.sh
cat /etc/udev/rules.d/70-persistent-net.rules3、创建网络配置文件：
cd /etc/sysconfig/
cat > ifconfig.enp0s3 << "EOF"
ONBOOT=yes
IFACE=enp0s3
SERVICE=ipv4-static
IP=192.168.3.27
GATEWAY=192.168.3.1
PREFIX=24
BROADCAST=192.168.3.255
EOF这里按照自己实际配置网络文件。就是第一章时，告诉大记住的网卡名，IP地址等。
4、创建/etc/resolv.conf文件：
cat > /etc/resolv.conf << "EOF"
# Begin /etc/resolv.conf
domain mylfs10.0
nameserver 192.168.3.1
# End /etc/resolv.conf
EOF5、配置系统主机名称：
echo "lfs10.0" > /etc/hostname6、创建 /etc/hosts 文件：
cat > /etc/hosts << "EOF"
# Begin /etc/hosts
127.0.0.1 localhost
192.168.3.20 lfs10.0
# End /etc/hosts
EOF7、创建 /etc/inittab 文件：
cat > /etc/inittab << "EOF"
# Begin /etc/inittab
id:3:initdefault:
si::sysinit:/etc/rc.d/init.d/rc S
l0:0:wait:/etc/rc.d/init.d/rc 0
l1:S1:wait:/etc/rc.d/init.d/rc 1
l2:2:wait:/etc/rc.d/init.d/rc 2
l3:3:wait:/etc/rc.d/init.d/rc 3
l4:4:wait:/etc/rc.d/init.d/rc 4
l5:5:wait:/etc/rc.d/init.d/rc 5
l6:6:wait:/etc/rc.d/init.d/rc 6
ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
su:S016:once:/sbin/sulogin
1:2345:respawn:/sbin/agetty --noclear tty1 9600
2:2345:respawn:/sbin/agetty tty2 9600
3:2345:respawn:/sbin/agetty tty3 9600
4:2345:respawn:/sbin/agetty tty4 9600
5:2345:respawn:/sbin/agetty tty5 9600
6:2345:respawn:/sbin/agetty tty6 9600
# End /etc/inittab
EOF8、创建 /etc/sysconfig/clock 文件：
cat > /etc/sysconfig/clock << "EOF"
# Begin /etc/sysconfig/clock
UTC=1
# Set this to any options you might need to give to hwclock,
# such as machine hardware clock type for Alphas.
CLOCKPARAMS=
# End /etc/sysconfig/clock
EOF9、配置控制台语言环境、创建 /etc/profile 文件：
cat > /etc/locale.conf << "EOF"
LANG=en_US.UTF-8
EOF
cat > /etc/profile << "EOF"
# Begin /etc/profile
export LANG=en_US.UTF-8
# End /etc/profile
EOF10、创建/ etc / inputrc文件：
cat > /etc/inputrc << "EOF"
# Begin /etc/inputrc
# Modified by Chris Lynn <[email protected]>
# Allow the command prompt to wrap to the next line
set horizontal-scroll-mode Off
# Enable 8bit input
set meta-flag On
set input-meta On
# Turns off 8th bit stripping
set convert-meta Off
# Keep the 8th bit for display
set output-meta On
# none, visible or audible
set bell-style none
# All of the following map the escape sequence of the value
# contained in the 1st argument to the readline specific functions
"\eOd": backward-word
"\eOc": forward-word
# for linux console
"\e[1~": beginning-of-line
"\e[4~": end-of-line
"\e[5~": beginning-of-history
"\e[6~": end-of-history
"\e[3~": delete-char
"\e[2~": quoted-insert
# for xterm
"\eOH": beginning-of-line
"\eOF": end-of-line
# for Konsole
"\e[H": beginning-of-line
"\e[F": end-of-line
# End /etc/inputrc
EOF11、创建/ etc / shells文件
cat > /etc/shells << "EOF"
# Begin /etc/shells
/bin/sh
/bin/bash
# End /etc/shells
EOF12、创建 /etc/fstab 文件：
cat > /etc/fstab << "EOF"
# Begin /etc/fstab
# file system mount-point type options dump fsck
# order
/dev/sda2 / ext4 defaults 1 1
/dev/sda1 swap swap pri=1 0 0
proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0
# End /etc/fstab
EOF这里需要将<XXX>（系统的启动盘）、<yyy>（系统的交换分区）、<fff>（启动盘的分区格式）更改下。
13、配置、编译和安装linux5.8.3内核：
cd /sources
tar xvf linux-5.8.3.tar.xz
cd linux-5.8.3
make mrproper
make defconfig
make menuconfig确保以下几项选择：
Device Drivers --->
Generic Driver Options --->
[ ] Support for uevent helper [CONFIG_UEVENT_HELPER]
[*] Maintain a devtmpfs filesystem to mount at /dev [CONFIG_DEVTMPFS]Processor type and features --->
[*] EFI stub support [CONFIG_EFI_STUB]General setup -->
[*] Control Group support [CONFIG_CGROUPS]配置好后，保存退出。
编译内核映像和模块并安装：
make
make modules_install移动内核镜像到 /boot （x86体系结构）：
cp -iv arch/x86/boot/bzImage /boot/vmlinuz-5.8.3-lfs-10.0内核的符号文件：
cp -iv System.map /boot/System.map-5.8.3安装Linux内核的文档：
install -d /usr/share/doc/linux-5.8.3
cp -r Documentation/* /usr/share/doc/linux-5.8.3创建 /etc/modprobe.d/usb.conf 文件：
install -v -m755 -d /etc/modprobe.d
cat > /etc/modprobe.d/usb.conf << "EOF"
# Begin /etc/modprobe.d/usb.conf
install ohci_hcd /sbin/modprobe ehci_hcd ; /sbin/modprobe -i ohci_hcd ; true
install uhci_hcd /sbin/modprobe ehci_hcd ; /sbin/modprobe -i uhci_hcd ; true
# End /etc/modprobe.d/usb.conf
EOF14、设置GRUB启动过程
将 GRUB 文件安装到 /boot/grub 并设置启动扇区：
grub-install /dev/sda创建 /boot/grub/grub.cfg 文件：
cat > /boot/grub/grub.cfg << "EOF"
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5
insmod ext2
set root=(hd0,2)
menuentry "GNU/Linux, Linux 5.8.3-lfs-10.0" {
linux /boot/vmlinuz-5.8.3-lfs-10.0 root=/dev/sda2 ro
}
EOF15、创建 /etc/lfs-release 文件：
echo 10.0 > /etc/lfs-release16、创建 /etc/lsb-release 文件：
cat > /etc/lsb-release << "EOF"
DISTRIB_ID="Linux From Scratch"
DISTRIB_RELEASE="10.0"
DISTRIB_CODENAME="<your name here>"
DISTRIB_DESCRIPTION="Linux From Scratch"
EOF17、创建 /etc/os-release 文件：
cat > /etc/os-release << "EOF"
NAME="Linux From Scratch"
VERSION="10.0"
ID=lfs
PRETTY_NAME="Linux From Scratch 10.0"
VERSION_CODENAME="<your name here>"
EOF18、最后一步，重新启动系统
退出chroot环境：
logout卸载虚拟文件系统：
umount -v $LFS/dev/pts
umount -v $LFS/dev
umount -v $LFS/run
umount -v $LFS/proc
umount -v $LFS/sys卸载主分区：
umount -v $LFS重新引导系统：
shutdown -r now
下一步，Blfs奋斗！
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谢谢大家观看~！~