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upgrade2.sh

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+#!/bin/sh
+# ============================================================
+# ImmortalWrt 固件一键升级脚本
+# 适用于 Redmi AC2100
+# ============================================================
+
+FIRMWARE_URL="https://git.stickrouter.com/mike/AC2100/src/branch/main/ac2100-op-lede.bin"
+FIRMWARE_FILE="/tmp/RedmiAC2100-HK2036.bin"
+
+echo "======================================================"
+echo "   ImmortalWrt 固件升级工具 - Redmi AC2100"
+echo "======================================================"
+echo ""
+echo "固件来源：$FIRMWARE_URL"
+echo ""
+
+# 检查磁盘空间
+FREE_SPACE=$(df /tmp | tail -1 | awk '{print $4}')
+if [ "$FREE_SPACE" -lt 20480 ]; then
+    echo "[错误] /tmp 空间不足，需要至少 20MB"
+    exit 1
+fi
+
+# 下载固件
+echo "[1/3] 正在下载固件..."
+wget --no-check-certificate -O "$FIRMWARE_FILE" "$FIRMWARE_URL"
+
+if [ $? -ne 0 ] || [ ! -f "$FIRMWARE_FILE" ]; then
+    echo "[错误] 固件下载失败，请检查网络连接"
+    exit 1
+fi
+
+FILESIZE=$(ls -lh "$FIRMWARE_FILE" | awk '{print $5}')
+echo "[OK] 固件下载完成，大小：$FILESIZE"
+echo ""
+
+# 确认升级
+echo "======================================================"
+echo "⚠️  警告："
+echo "  - 升级后路由器将自动重启"
+echo "  - 不保留任何配置（-n 参数）"
+echo "  - 升级过程请勿断电，约需 2-3 分钟"
+echo "  - 升级完成后 IP 变为 192.168.6.66"
+echo "======================================================"
+echo ""
+printf "[?] 确认升级？(y/N): "
+read CONFIRM
+
+if [ "$CONFIRM" != "y" ] && [ "$CONFIRM" != "Y" ]; then
+    echo "已取消升级"
+    rm -f "$FIRMWARE_FILE"
+    exit 0
+fi
+
+# 执行升级
+echo ""
+echo "[3/3] 开始升级，请勿断电..."
+echo "SSH 连接将断开，请等待 2-3 分钟后重新连接 192.168.6.66"
+echo ""
+sysupgrade -F -n "$FIRMWARE_FILE"