安装
sudo apt-get install debootstrap
下载rootfs
debootstrap --no-check-gpg --arch=amd64 --include=vim,ca-certificates,net-tools,iputils-ping,iputils-tracepath,iproute,bash,aptitude,locales-all,openssh-server,openssh-client jessie debian-jessie http://mirrors.ustc.edu.cn/debian
这里用的jessie，其实就是 debian 8， 是一个比较就的稳定版
尝试下载 stretch（debian 9）和 buster（debian 10）， 发现最高只能到9。 10下载的不完整，有问题。 难道是源的问题？
james@james-virtual-machine:~/x86/debootstrap/test$ ls debian*
debian10:
debootstrap var
debian9:
bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
chroot
用下面脚本
./ch-mount.sh -m jessie
是可以用的。
下载内核：
apt-get install linux-image-amd64
解压内核
参考https://access.redhat.com/solutions/24029
cd /boot
zcat initrd.img-3.16.0-6-amd64 | cpio -idmv
打包内核：
find . | cpio -o -c -R root:root | gzip -9 > /boot/new.img
分析 /init
vi init
启动后会去挂载真实的root
具体分析见另一篇文章
查看debian版本：
cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL=https://bugs.debian.org/
chroot-mnt.sh 脚本
#!/bin/bash
function mnt() {
echo "MOUNTING"
sudo mount -t proc /proc ${2}proc
sudo mount -t sysfs /sys ${2}sys
sudo mount -o bind /dev ${2}dev
sudo mount -o bind /dev/pts ${2}dev/pts
sudo chroot ${2}
}
function umnt() {
echo "UNMOUNTING"
sudo umount ${2}proc
sudo umount ${2}sys
sudo umount ${2}dev/pts
sudo umount ${2}dev
}
if [ "$1" == "-m" ] && [ -n "$2" ] ;
then
mnt $1 $2
elif [ "$1" == "-u" ] && [ -n "$2" ];
then
umnt $1 $2
else
echo ""
echo "Either 1'st, 2'nd or both parameters were missing"
echo ""
echo "1'st parameter can be one of these: -m(mount) OR -u(umount)"
echo "2'nd parameter is the full path of rootfs directory(with trailing '/')"
echo ""
echo "For example: ch-mount -m /media/sdcard/"
echo ""
echo 1st parameter : ${1}
echo 2nd parameter : ${2}
fi