Setup Ubuntu & MEMTEST86+ with Ventoy

ventoy-setup.sh

#!/bin/bash

set -euo pipefail

VENTOY_VERSION="${VENTOY_VERSION:-1.1.07}"
MEMTEST_VERSION="${MEMTEST_VERSION:-7.20}"
UBUNTU_VERSION="${UBUNTU_VERSION:-25.04}"

show_help() {
  cat <<EOF
Usage: $0 COMMAND [ARGS]

COMMANDS
  download         Download the specified version
  install DEVICE   Install Ventoy with Ubuntu and MEMTEST86+ on the specified device (ERASE EVERYTHING!)
  update DEVICE    Update Ventoy with Ubuntu and MEMTEST86+ on the specified device
  --help     Show this help message
EOF
}

download() {
  mkdir -p bin

  pushd bin

  echo "--- Downloading Ventoy $VENTOY_VERSION..."
  wget --continue "https://freefr.dl.sourceforge.net/project/ventoy/v${VENTOY_VERSION}/ventoy-${VENTOY_VERSION}-linux.tar.gz"
  tar -xzf "ventoy-${VENTOY_VERSION}-linux.tar.gz"

  echo "--- Downloading MEMTEST86+ $MEMTEST_VERSION..."
  wget --continue "https://www.memtest.org/download/v${MEMTEST_VERSION}/mt86plus_${MEMTEST_VERSION}_64.iso.zip"
  unzip -o "mt86plus_${MEMTEST_VERSION}_64.iso.zip"

  echo "--- Downloading Ubuntu $UBUNTU_VERSION..."
  wget --continue "https://releases.ubuntu.com/${UBUNTU_VERSION}/ubuntu-${UBUNTU_VERSION}-desktop-amd64.iso"

  popd
}

install() {
  local flag="$1"
  local device="$2"

  mkdir -p mount

  if mount | grep -q "${device}1"; then
    echo "--- Unmounting ${device}1..."
    sudo umount -v "${device}1"
  fi

  echo "--- Installing Ventoy on $device..."
  sudo "./bin/ventoy-${VENTOY_VERSION}/Ventoy2Disk.sh" "$flag" "$device"

  sudo mount -v -o "uid=$(id -u),gid=$(id -g)" "${device}1" ./mount

  if [[ "$flag" = "-I" ]]; then
    echo "--- Creating ubuntu persistence filesystem..."
    dd if=/dev/zero of=./mount/ubuntu-persistence.dat bs=1M count=16384 status=progress
    mkfs.ext4 -L casper-rw ./mount/ubuntu-persistence.dat
  fi

  cat >./mount/ventoy.json <<EOF
{
  "persistence": [
      {
          "image": "/ubuntu-${UBUNTU_VERSION}-desktop-amd64.iso",
          "backend": "/ubuntu-persistence.dat"
      }
  ]
}
EOF

  rsync -avh --info=progress2 ./bin/memtest.iso "./bin/ubuntu-${UBUNTU_VERSION}-desktop-amd64.iso" ./mount

  echo "--- Wait until the filesystem is fully unmounted..."
  sudo umount -v "${device}1"
  rm -d ./mount
}

if [[ $# -eq 0 ]]; then
  show_help
  exit 1
fi

case "$1" in
download)
  download
  ;;
install)
  if [[ $# -lt 2 ]]; then
    echo "Error: missing DEVICE"
    exit 1
  fi
  install -I "$2"
  ;;
update)
  if [[ $# -lt 2 ]]; then
    echo "Error: missing DEVICE"
    exit 1
  fi
  install -u "$2"
  ;;
--help | -h)
  show_help
  ;;
*)
  echo "Unknown command: $1"
  show_help
  exit 1
  ;;
esac