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arch_chroot.md

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Caution

READ CAREFULLY! When using Chroot environments to exit completely close the Termux application even from the background apps or if necessary force close it. Otherwise, in case you do some command like "rm -rf chrootFolder" the device will go crazy and you will have to force reboot it.

📚 Index

Thanks to Frodo || 🧠🪱 user from my Discord 😄

CHROOT (🔼 ARCH)



Note

All the process is described in this video - pending

🏁 First steps

  1. First you need to have your device rooted.
  2. You need to flash Busybox with Magisk.
  3. Then you need to install the following packages in Termux:
pkg update
pkg install x11-repo
pkg install root-repo
pkg install termux-x11-nightly
pkg update
pkg install tsu
pkg install pulseaudio

💻 Setting Arch chroot

  • Enter Termux super user terminal with the command su
  • Navigate to the folder where you want to install Arch Chroot and download the rootfs tar ball.
cd /data/local/tmp
wget http://os.archlinuxarm.org/os/ArchLinuxARM-aarch64-latest.tar.gz
  • Create a folder to uncompress the file:
mkdir chrootarch
cd chrootarch

tar xvf /data/local/tmp/ArchLinuxARM-aarch64-latest.tar.gz --numeric-owner
  • Create needed folders:
mkdir media
mkdir media/sdcard
mkdir dev/shm
  • Create resolv.conf file, paste the following content and replace the original file
vi resolv.conf

# Content
nameserver 8.8.8.8
nameserver 8.8.4.4

mv -vf resolv.conf etc/resolv.conf
  • Create hosts file, paste the following content and replace the original file
vi hosts

# Content
127.0.0.1 localhost

mv -vf hosts etc/hosts
  • Create the start script:
cd /data/local/tmp
vi start_arch.sh

#!/bin/sh

mnt="/data/local/tmp/chrootarch"
busybox mount -o remount,dev,suid /data

mount -o bind /dev $mnt/dev/
busybox mount -t proc proc $mnt/proc/
busybox mount -t sysfs sysfs $mnt/sys/
busybox mount -t devpts devpts $mnt/dev/pts/
busybox mount -o bind /sdcard $mnt/media/sdcard
busybox mount -t tmpfs /cache $mnt/var/cache

# /dev/shm for Electron apps
busybox mount -t tmpfs -o size=256M tmpfs $mnt/dev/shm

# chroot into Arch
busybox chroot $mnt /bin/su - root
  • Make the script executable and run it. The prompt will change to root@localhost
chmod +x start_arch.sh
sh start_arch.sh
  • Comment CheckSpace pacman config so we can install and update packages
nano /etc/pacman.conf

Now comment the line where it says CheckSpace by placing the character # at the beginning

  • Initialize pacman keys
rm -r /etc/pacman.d/gnupg
pacman-key --init
pacman-key --populate archlinuxarm
pacman-key --refresh-keys

Tip: You can edit the mirrorlist and uncomment mirrors close to your location: nano /etc/pacman.d/mirrorlist

  • Execute some fixes
groupadd -g 3003 aid_inet
groupadd -g 3004 aid_net_raw
groupadd -g 1003 aid_graphics
usermod -G 3003 -a root
  • Upgrade the system and install common tools
pacman -Syu
pacman -S vim net-tools sudo git
  • Create a new user, in this case droidmaster
groupadd storage
groupadd wheel
useradd -m -g users -G wheel,audio,video,storage,aid_inet -s /bin/bash droidmaster
passwd droidmaster
  • Add the user to sudoers file so you can execute sudo commands
nano /etc/sudoers

# Paste this 
droidmaster  ALL=(ALL:ALL) ALL
  • Fix locales to avoid weird characters:
sudo nano /etc/locale.gen

# Uncomment en_US UTF-8 UTF-8

sudo locale-gen

sudo nano /etc/locale.conf
# Replace LANG=C with LANG=en_US.UTF-8
  • Install XFCE4 Desktop
sudo pacman -S xfce4 xfce4-terminal
  • Exit the chroot environment and modify the start_arch.sh file that we created previously. Comment the last line and add the following one
vi start_arch.sh

#busybox chroot $mnt /bin/su - root
busybox chroot $mnt /bin/su - droidmaster -c "export DISPLAY=:0 PULSE_SERVER=tcp:127.0.0.1:4713 && dbus-launch --exit-with-session startxfce4"
  • Let's run the Desktop Environment. Exit chroot environment and copy the following commands on Termux (you can close everything an reopen Termux to be sure you are outside chroot).
wget https://raw.githubusercontent.com/LinuxDroidMaster/Termux-Desktops/main/scripts/chroot/arch/startxfce4_chrootArch.sh

chmod +x startxfce4_chrootArch.sh
./startxfce4_chrootArch.sh