Greetings.
How to update Linux SDK to next version providing that:
1. you have remote access to another system connected to board's terminal COM-port and HDMI display, so acces to U-BOOT is possible
2. you have remote access using remote SSH session to the board
3. you have only one bootable option (no switch avalable from SD-card to Flash or SSD)
4. linux access library for file copy process cannot be overwritten when Linux is loaded
5. physical board located remotely and automation cable is not present for hot restart/boot switching.
Thanks,
Alexey