catalogue

Download the Ubuntu root file system and the firefly root file system

Installing virtual machines

Extract and create root file system

Copy the official peripheral driver file

Mount root file system

Configure root file system

Make root file system

This paper refers to the following disclosure:

RK3399 make ubuntu from zero - Firefly RK3399 - Firefly open source community RK3399 make ubuntu from zero

How to make rootfs file of ubuntu arm64_ Elastic China community official blog - CSDN blog

Download the Ubuntu root file system and the firefly root file system

 Ubuntu:

http://cdimage.ubuntu.com/ubuntu-base/releases/18.04/release/ubuntu-base-18.04.5-base-arm64.tar.gz

 firefly:

Firefly | make technology simpler and life smarter

PS: I use the whole machine of firefly. Downloading the root file system made by firefly is to use the official peripheral driver

 

Installing virtual machines

apt-get install qemu-user-static

 

Extract and create root file system

mkdir ubuntu-rootfs
tar -xpf ubuntu-base-18.04.5-base-arm64.tar.gz -C ubuntu-rootfs

Copy the running environment of the virtual machine

cp -b /etc/resolv.conf ubuntu-rootfs/etc/resolv.conf
cp /usr/bin/qemu-aarch64-static ubuntu-rootfs/usr/bin/

 

Copy the official peripheral driver file

Mount the root file system of firefly and copy the three folders / vendor, / system, / lib/firmware to our own file system.

 

Mount root file system

Create ch mount SH file, write the following script

#!/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
    echo "CHROOT..."
    sudo chroot ${2}
    echo "Success!"
}
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

Perform mount

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

 

Configure root file system

Here are some configurations I made and some pits I encountered, which can be selectively made according to needs

• Change the source (after changing the source, it may not be updated due to the problem of certificate. Just change all https in the source to http)
• Configure the root account password (sometimes an error is reported during configuration. If sudo is installed, use sudo passwd root)
• Add personal account and configure password

  useradd -s '/bin/bash' -m -G adm,sudo alex

• Install some basic packages

  apt-get install language-pack-en-base ca-certificates sudo ssh net-tools ethtool wireless-tools network-manager iputils-ping rsyslog bash-completion vim

• Set host name

  echo 'alex-gateway' > /etc/hostname

• In the step of setting resolvconf (decompressing and creating the root file system), resolv.conf is copied, but it is copied from the vmware virtual machine. Therefore, the problem of WiFi connection but no internet access will appear in the box. It will appear when ping baidu.com Temporary failure in name resolution)

  apt-get install resolvconf
  dpkg-reconfigure resolvconf
  
  yes
  
  #Edit configuration
  vi /etc/resolvconf/resolv.conf.d/head
  
  #Add nameserver
  nameserver 114.114.114.114
  nameserver 8.8.8.8
  

• To be added

Make root file system

After configuration, exit the virtual machine and cancel the mount

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

Create mkrootfs SH file and write the following script. 2048 depends on the actual size of your root file system. For example, if the size exceeds 2048M after installing the desktop environment, it should be larger

#!/bin/bash
#
dd if=/dev/zero of=linuxroot.img bs=1M count=2048
sudo  mkfs.ext4  linuxroot.img
rm -r rootfs
mkdir  rootfs
sudo mount linuxroot.img rootfs/
sudo cp -rfp ubuntu-rootfs/*  rootfs/
sudo umount rootfs/
e2fsck -p -f linuxroot.img
resize2fs  -M linuxroot.img

Executive production

./mkrootfs.sh

-Over -