為n1製作aarcm64/arm64 ubuntu rootfs系統

摘要： 安裝debootstrap和qemu-user-static： apt install apt-transport-https qemu qemu-user-static binfmt-support debootstrap 構建ubuntu 18.04系統，基礎包為minbase，使...

安裝debootstrap和qemu-user-static：

apt install apt-transport-https qemu qemu-user-static binfmt-support debootstrap

構建ubuntu 18.04系統，基礎包為minbase，使用清大的源：

qemu-debootstrap --arch arm64 --variant=minbase --include=whiptail,ca-certificates,tzdata bionic rootfs http://mirrors.ustc.edu.cn/ubuntu-ports/

配置軟體源：

cat > rootfs/etc/apt/sources.list <<EOF
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
EOF

配置網路資訊：

mkdir rootfs/etc/network/ 
echo 'nameserver 192.168.168.1' > rootfs/etc/resolv.conf
echo 'ubuntu-18.04' > rootfs/etc/hostname
cat > rootfs/etc/netplan/50-cloud-init.yaml <<EOF
network:
ethernets:
eth0:
addresses:
- 192.168.168.6/24
dhcp4: false
gateway4: 192.168.168.1
nameservers:
addresses:
- 192.168.168.1
search: []
version: 2
EOF

掛載本地裝置檔案到rootfs：

mount -t proc /procrootfs/proc 
mount -t sysfs /sysrootfs/sys 
mount -o bind /devrootfs/dev 
mount -o bind /dev/ptsrootfs/dev/pts

chroot rootfs內配置：

LANG=C.UTF-8 chroot rootfs//bin/bash

在rootfs內執行：

cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
apt update
apt upgrade
apt install systemd -y 
apt install wireless-regdb crda -y
apt install rsyslog udev dbus kmod openssh-server netplan.io man vim wget net-tools sysstat tmux less wireless-regdb crda dosfstools parted rng-tools -y
echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config
passwd root
umount /dev/pts/ /dev/ /proc/ /sys 
exit

為方便使用之前編譯的核心和armbian的uInitrd、firmware檔案，掛載armbian的img映象到本地：

losetup -P -f --show Armbian_5.62_Aml-s9xxx_Ubuntu_bionic_default_4.18.7_20181012.img
mount /dev/loop3p2 /mnt
mount /dev/loop3p2 /mnt/boot
mv /mnt/boot/* rootfs/boot/
mv /mnt/lib/modules/ rootfs/lib/
#也可安裝armbian的firmware-aml-4.18-20181011_5.62_arm64.deb
mv /mnt/lib/firmware/ rootfs/lib/
mv /mnt/etc/modprobe.d/ rootfs/etc/
mv /mnt/etc/fstab rootfs/etc/
mv /mnt/root/install.sh rootfs/root/

將armbain映象內的檔案全部刪除，將新做的系統移動過去。

mv rootfs/boot/* /mnt/boot/
mv rootfs/* /mnt/

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