以Ubuntu Base构建文件系统的示例

wget http://cdimage.ubuntu.com/ubuntu-base/releases/22.04/release/ubuntu-base-22.04-base-arm64.tar.gz

mkdir ubuntu-rootfs
sudo chown root:root ubuntu-rootfs
sudo tar -xvf ubuntu-base-22.04-base-arm64.tar.gz -C ubuntu-rootfs

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sudo apt-get install qemu-user-static
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cd ubuntu-rootfs
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sudo cp /usr/bin/qemu-aarch64-static  usr/bin
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sudo cp -b /etc/resolv.conf etc/
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cd ../

vim ch-mount.sh

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!/bin/bash
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function mnt() {
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echo "MOUNTING"
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sudo mount -t proc /proc ${2}proc
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sudo mount -t sysfs /sys ${2}sys
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sudo mount -o bind /dev ${2}dev
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sudo mount -o bind /dev/pts ${2}dev/pts
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sudo chroot ${2}
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}
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function umnt() {
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echo "UNMOUNTING"
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sudo umount ${2}proc
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sudo umount ${2}sys
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sudo umount ${2}dev/pts
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sudo umount ${2}dev
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}
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if [ "$1" == "-m" ] && [ -n "$2" ] ;
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then
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mnt $1 $2
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elif [ "$1" == "-u" ] && [ -n "$2" ];
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then
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umnt $1 $2
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else
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echo ""
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echo "Either 1'st, 2'nd or both parameters were missing"
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echo ""
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echo "1'st parameter can be one of these: -m(mount) OR -u(umount)"
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echo "2'nd parameter is the full path of rootfs directory(with trailing '/')"
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echo ""
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echo "For example: ch-mount -m /media/sdcard/"
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echo ""
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echo 1st parameter : ${1}
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echo 2nd parameter : ${2}
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fi

./ch-mount.sh -m ubuntu-rootfs/

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apt-get install \
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language-pack-en-base \
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sudo \
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ssh \
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net-tools \
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network-manager \
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iputils-ping \
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rsyslog \
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bash-completion \
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htop \

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useradd -s '/bin/bash' -m -G adm,sudo yourusername
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echo "Set password for yourusername:"
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passwd yourusername
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echo "Set password for root:"
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passwd root

echo 'ubuntu.yourusername' > /etc/hostname

start on stopped rc or RUNLEVEL=[12345]
stop on RUNLEVEL [!12345]
respawn
exec /sbin/getty -L 115200 ttyFIQ0 vt102

exit
./ch-mount -u ubuntu-rootfs\

dd if=/dev/zero of=ubuntu-rootfs.img bs=4M count=2048
sudo mkfs.ext4 ubuntu-rootfs.img

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mkdir  ubuntu-mount
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sudo mount ubuntu-rootfs.img ubuntu-mount/
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sudo cp -rfp ubuntu-rootfs/*  ubuntu-mount/
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sudo umount ubuntu-mount/
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e2fsck -p -f ubuntu-rootfs.img
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resize2fs -M ubuntu-rootfs.img