目前系统自带的版本是3.3，但是项目中需要的最低版本是4.2，而查了下资料，似乎4.4版本以后才支持在线升级，低版本的只能刷机，怎么搞啊，以下是原文：

The method was verified with Jetson AGX boards with JetPack 4.2.3[L4T 32.4.3], 4.3[L4T 32.3.1] and 4.4[L4T 32.2.1].
It is also worth mentioning that SDK 2.43.0 added support for Jetpack 4.4.1 (L4T 32.44) and JetPack 4.5 (L4T 32.5).