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oginstaller/chroot_setup.sh

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#!/bin/bash
set -x
set -e
export HOME=/root
export LC_ALL=C
function set_root_passwd(){
echo "root:root" | chpasswd
}
function setup_sources_list () {
echo "Setting up sources.list"
cat <<EOF > $CHROOT_DIR/etc/apt/sources.list
deb http://us.archive.ubuntu.com/ubuntu/ noble main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ noble main restricted universe multiverse
deb http://us.archive.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse
deb http://us.archive.ubuntu.com/ubuntu/ noble-updates main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ noble-updates main restricted universe multiverse
EOF
apt update -y
apt-get -y upgrade
}
function configure_divert() {
echo "Configuring divert"
dbus-uuidgen > /etc/machine-id
ln -fs /etc/machine-id /var/lib/dbus/machine-id
dpkg-divert --local --rename --add /sbin/initctl
ln -s /bin/true /sbin/initctl
}
function mount_proc_sys_dev() {
echo "Mounting proc, sys and dev"
mount -t proc proc /proc
mount -t sysfs sys /sys
mount -t devpts devpts /dev/pts
}
function install_packages() {
echo "Installing packages"
apt install -y $@
}
function set_pkg_configuration() {
echo "keyboard-configuration keyboard-configuration/layout select Spanish" | debconf-set-selections
echo "keyboard-configuration keyboard-configuration/variant select Spanish" | debconf-set-selections
echo "keyboard-configuration keyboard-configuration/xkb-keymap select es" | debconf-set-selections
}
function install_non_interactive() {
echo "Installing packages non interactive"
apt install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" $@
}
function install_no_recommends() {
echo "Installing packages without recommends"
apt install -y --no-install-recommends $@
}
function setup_chroot() {
echo "Setting up chroot"
dbus-uuidgen > /etc/machine-id
apt update -y
ln -fs /etc/machine-id /var/lib/dbus/machine-id
ln -s /bin/true /sbin/initctl
}
function remove_unneeded_packages() {
echo "Removing unneeded packages"
apt remove -y --purge --auto-remove snapd
}
function reconfigure_locales() {
echo "Configuring locales"
sed -i 's/# es_ES.UTF-8 UTF-8/es_ES.UTF-8 UTF-8/' /etc/locale.gen
sed -i 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen
locale-gen
ln -sf /usr/share/zoneinfo/Europe/Madrid /etc/localtime
echo "Europe/Madrid" > /etc/timezone
dpkg-reconfigure -f noninteractive tzdata
}
function reconfigure_network_manager() {
echo "Configuring network manager"
mkdir -p /etc/NetworkManager
cat <<EOF > /etc/NetworkManager/NetworkManager.conf
[main]
plugins=keyfile
[keyfile]
unmanaged-devices=none
EOF
mkdir -p /etc/NetworkManager/system-connections/
cat <<EOL > /etc/NetworkManager/system-connections/dhcp-all.nmconnection
[connection]
id=Cable
type=ethernet
autoconnect=true
[ipv4]
method=auto
EOL
systemctl enable NetworkManager
}
function reconfigure_packages() {
reconfigure_locales
reconfigure_network_manager
}
function create_image() {
mkdir -p /image/{casper,isolinux,install}
cp /boot/vmlinuz-**-**-generic /image/casper/vmlinuz
cp /boot/initrd.img-**-**-generic /image/casper/initrd
wget --progress=dot https://memtest.org/download/v7.00/mt86plus_7.00.binaries.zip -O /image/install/memtest86.zip
unzip -p /image/install/memtest86.zip memtest64.bin > /image/install/memtest86+.bin
unzip -p /image/install/memtest86.zip memtest64.efi > /image/install/memtest86+.efi
rm -f /image/install/memtest86.zip
}
function configure_grub_menu() {
touch /image/ubuntu
cat <<EOF > /image/isolinux/grub.cfg
search --set=root --file /ubuntu
insmod all_video
set default="0"
set timeout=30
menuentry "Install Ubuntu FS" {
linux /casper/vmlinuz boot=casper quiet splash ---
initrd /casper/initrd
}
menuentry "Check disc for defects" {
linux /casper/vmlinuz boot=casper integrity-check quiet splash ---
initrd /casper/initrd
}
grub_platform
if [ "\$grub_platform" = "efi" ]; then
menuentry 'UEFI Firmware Settings' {
fwsetup
}
menuentry "Test memory Memtest86+ (UEFI)" {
linux /install/memtest86+.efi
}
else
menuentry "Test memory Memtest86+ (BIOS)" {
linux16 /install/memtest86+.bin
}
fi
EOF
# Generate manifest
dpkg-query -W --showformat='${Package} ${Version}\n' | sudo tee /image/casper/filesystem.manifest
cp -v /image/casper/filesystem.manifest /image/casper/filesystem.manifest-desktop
sed -i '/ubiquity/d' /image/casper/filesystem.manifest-desktop
sed -i '/casper/d' /image/casper/filesystem.manifest-desktop
sed -i '/discover/d' /image/casper/filesystem.manifest-desktop
sed -i '/laptop-detect/d' /image/casper/filesystem.manifest-desktop
sed -i '/os-prober/d' /image/casper/filesystem.manifest-desktop
# Create diskdefines
cat <<EOF > /image/README.diskdefines
#define DISKNAME Ubuntu from scratch
#define TYPE binary
#define TYPEbinary 1
#define ARCH amd64
#define ARCHamd64 1
#define DISKNUM 1
#define DISKNUM1 1
#define TOTALNUM 0
#define TOTALNUM0 1
EOF
}
function create_image2(){
cp /usr/lib/shim/shimx64.efi.signed.previous /image/isolinux/bootx64.efi
cp /usr/lib/shim/mmx64.efi /image/isolinux/mmx64.efi
cp /usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed /image/isolinux/grubx64.efi
cd /image/isolinux && \
dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
mkfs.vfat -F 16 efiboot.img && \
LC_CTYPE=C mmd -i efiboot.img efi efi/ubuntu efi/boot && \
LC_CTYPE=C mcopy -i efiboot.img ./bootx64.efi ::efi/boot/bootx64.efi && \
LC_CTYPE=C mcopy -i efiboot.img ./mmx64.efi ::efi/boot/mmx64.efi && \
LC_CTYPE=C mcopy -i efiboot.img ./grubx64.efi ::efi/boot/grubx64.efi && \
LC_CTYPE=C mcopy -i efiboot.img ./grub.cfg ::efi/ubuntu/grub.cfg && \
# Create a grub bios images
cd /image && \
grub-mkstandalone \
--format=i386-pc \
--output=isolinux/core.img \
--install-modules="linux16 linux normal iso9660 biosdisk memdisk search tar ls" \
--modules="linux16 linux normal iso9660 biosdisk search" \
--locales="" \
--fonts="" \
"boot/grub/grub.cfg=isolinux/grub.cfg"
cat /usr/lib/grub/i386-pc/cdboot.img isolinux/core.img > isolinux/bios.img
# find . -type f -print0 | xargs -0 md5sum | grep -v -e 'isolinux' > md5sum.txt
}
function clean (){
truncate -s 0 /etc/machine-id
rm /sbin/initctl
dpkg-divert --rename --remove /sbin/initctl
apt-get clean
rm -rf /tmp/* ~/.bash_history
umount /proc
umount /sys
umount /dev/pts
export HISTSIZE=0
}
function autostart_calamares() {
mkdir -p /etc/xdg/openbox
echo <<EOF > /etc/xdg/openbox/autostart
calamares &
EOF
}
function configure_lightdm() {
mkdir -p /etc/lightdm
cat <<EOF > /etc/lightdm/lightdm.conf
[Seat:*]
autologin-user=root
autologin-user-timeout=0
user-session=openbox
greeter-session=lightdm-gtk-greeter
EOF
}
function install_mesa_repo() {
add-apt-repository ppa:kisak/kisak-mesa
apt -y update
}
## Main
echo "ubuntu-fs-live" > /etc/hostname
mount_proc_sys_dev
setup_sources_list
install_packages libterm-readline-gnu-perl systemd-sysv software-properties-common
setup_chroot
set_pkg_configuration
install_mesa_repo
install_packages sudo ubuntu-standard sudo casper dbus-bin mesa-utils mesa-vulkan-drivers discover isc-dhcp-client laptop-detect unzip os-prober network-manager net-tools wireless-tools wpagui locales grub-common grub-gfxpayload-lists grub-pc grub-pc-bin grub2-common grub-efi-amd64-signed shim-signed mtools binutils virtualbox-guest-utils virtualbox-guest-x11
install_non_interactive xorg xinit openbox lightdm plymouth calamares
install_no_recommends linux-image-generic
set_root_passwd
configure_divert
configure_lightdm
autostart_calamares
remove_unneeded_packages
reconfigure_packages
create_image
configure_grub_menu
create_image2
clean
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