fix: update Linux bootable to Ubuntu 24.04.4, add format-persistence.sh, rewrite guide

- Update all 24.04.2 references to 24.04.4 (ISO name, URLs, SHA256, docs)
- Add format-persistence.sh to bootable/linux-setup/ (from working E: drive)
- Rewrite website guide.html Linux tutorial: Linux Mint + Rufus → Ventoy + Ubuntu

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bootable/2-download-iso.ps1

@@ -12,17 +12,17 @@ Write-Host "============================================" -ForegroundColor Cyan
 Write-Host ""
 
 # ── Config ──
-$ISOName = "ubuntu-24.04.2-desktop-amd64.iso"
-$SHA256Expected = "d6dab0c3a657988501b4bd76f1297c053df710e06e0c3aece60dead24f270b4d"
+$ISOName = "ubuntu-24.04.4-desktop-amd64.iso"
+$SHA256Expected = "3a4c9877b483ab46d7c3fbe165a0db275e1ae3cfe56a5657e5a47c2f99a99d1e"
 $CacheDir = Join-Path $PSScriptRoot ".download-cache"
 $ISOPath = Join-Path $CacheDir $ISOName
 
 # Mirror list (China mirrors first)
 $Mirrors = @(
-    "https://mirrors.tuna.tsinghua.edu.cn/ubuntu-releases/24.04.2/$ISOName",
-    "https://mirrors.aliyun.com/ubuntu-releases/24.04.2/$ISOName",
-    "https://mirrors.ustc.edu.cn/ubuntu-releases/24.04.2/$ISOName",
-    "https://releases.ubuntu.com/24.04.2/$ISOName"
+    "https://mirrors.tuna.tsinghua.edu.cn/ubuntu-releases/24.04.4/$ISOName",
+    "https://mirrors.aliyun.com/ubuntu-releases/24.04.4/$ISOName",
+    "https://mirrors.ustc.edu.cn/ubuntu-releases/24.04.4/$ISOName",
+    "https://releases.ubuntu.com/24.04.4/$ISOName"
 )
 
 # ── Create cache directory ──
@@ -50,7 +50,7 @@ if (Test-Path $ISOPath) {
 }
 
 # ── Download ISO ──
-Write-Host "[INFO] Downloading Ubuntu 24.04.2 Desktop (~5.8 GB)..." -ForegroundColor Yellow
+Write-Host "[INFO] Downloading Ubuntu 24.04.4 Desktop (~5.8 GB)..." -ForegroundColor Yellow
 Write-Host "       This will take a while depending on your connection." -ForegroundColor Gray
 Write-Host ""
 
@@ -76,8 +76,8 @@ foreach ($mirror in $Mirrors) {
 if (-not $downloaded) {
     Write-Host ""
     Write-Host "[ERROR] All download mirrors failed." -ForegroundColor Red
-    Write-Host "        Please download Ubuntu 24.04.2 Desktop ISO manually:" -ForegroundColor Yellow
-    Write-Host "        https://releases.ubuntu.com/24.04.2/" -ForegroundColor Yellow
+    Write-Host "        Please download Ubuntu 24.04.4 Desktop ISO manually:" -ForegroundColor Yellow
+    Write-Host "        https://releases.ubuntu.com/24.04.4/" -ForegroundColor Yellow
     Write-Host "        Save it as: $ISOPath" -ForegroundColor Yellow
     Read-Host "Press Enter to exit"
     exit 1

bootable/4-copy-to-usb.ps1

@@ -13,7 +13,7 @@ Write-Host ""
 
 # ── Config ──
 $CacheDir = Join-Path $PSScriptRoot ".download-cache"
-$ISOName = "ubuntu-24.04.2-desktop-amd64.iso"
+$ISOName = "ubuntu-24.04.4-desktop-amd64.iso"
 $ISOPath = Join-Path $CacheDir $ISOName
 $PersistencePath = Join-Path $CacheDir "persistence.dat"
 $VentoyConfigDir = Join-Path $PSScriptRoot "ventoy"

bootable/README.md

@@ -35,7 +35,7 @@
 │    - 开源引导管理器 v1.0.99                  │
 │                                            │
 │  Ventoy 数据分区（可见）                     │
-│    ubuntu-24.04.2-desktop-amd64.iso  5.8GB │
+│    ubuntu-24.04.4-desktop-amd64.iso  5.8GB │
 │    persistence.dat                   20GB  │
 │    ventoy/ventoy.json                配置   │
 │    u-claw-linux/                     脚本   │
@@ -93,7 +93,7 @@ cd path\to\u-claw\bootable
 
 ### Step 2: 下载 Ubuntu ISO (`2-download-iso.ps1`)
 
-- 从国内镜像下载 Ubuntu 24.04.2 桌面版（~5.8GB）
+- 从国内镜像下载 Ubuntu 24.04.4 桌面版（~5.8GB）
 - 镜像优先级：清华 → 阿里 → 中科大 → 官方
 - SHA256 校验确保文件完整
 - 有缓存，不会重复下载
@@ -176,7 +176,7 @@ sudo bash /media/*/Ventoy/u-claw-linux/setup-openclaw.sh
 {
   "persistence": [
     {
-      "image": "/ubuntu-24.04.2-desktop-amd64.iso",
+      "image": "/ubuntu-24.04.4-desktop-amd64.iso",
       "backend": "/persistence.dat",
       "autosel": 1
     }
@@ -204,6 +204,7 @@ bootable/
 ├── 3-create-persistence.ps1       Step 3: 持久化镜像
 ├── 4-copy-to-usb.ps1              Step 4: 拷贝到 U 盘
 ├── linux-setup/
+│   ├── format-persistence.sh      格式化持久化镜像
 │   ├── setup-openclaw.sh          一键安装 OpenClaw
 │   ├── start-openclaw.sh          启动脚本
 │   └── openclaw.desktop           桌面快捷方式

bootable/TROUBLESHOOTING.md

@@ -18,7 +18,7 @@
 1. 脚本会自动尝试多个国内镜像（清华、阿里、中科大）
 2. 如果全部失败，可以手动下载：
    - 访问 https://mirrors.tuna.tsinghua.edu.cn/ubuntu-releases/24.04/
-   - 下载 `ubuntu-24.04.2-desktop-amd64.iso`
+   - 下载 `ubuntu-24.04.4-desktop-amd64.iso`
    - 放到 `bootable/.download-cache/` 目录
 3. 重新运行 `2-download-iso.ps1`
 

bootable/linux-setup/format-persistence.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+# One-click create and format persistence.dat for Ventoy
+set -euo pipefail
+VENTOY_DIR=$(dirname "$(dirname "$(readlink -f "$0")")")
+PERSIST="$VENTOY_DIR/persistence.dat"
+SIZE_GB=20
+echo "Creating ${SIZE_GB}GB persistence image..."
+dd if=/dev/zero of="$PERSIST" bs=1M count=0 seek=$((SIZE_GB * 1024))
+mkfs.ext4 -F -L casper-rw "$PERSIST"
+echo "Done! Reboot for persistence to take effect."

bootable/ventoy/ventoy.json

@@ -1,7 +1,7 @@
 {
   "persistence": [
     {
-      "image": "/ubuntu-24.04.2-desktop-amd64.iso",
+      "image": "/ubuntu-24.04.4-desktop-amd64.iso",
       "backend": "/persistence.dat",
       "autosel": 1
     }