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→Linux-based upgrading
* A typical strategy on '''headless systems''' is to create custom init scripts that perform checks on the file system at boot, looking for upgrade packages and triggering the upgrade procedure when required.
* Please note that, in order to erase and write MTD flash partitions, their writability flag must be set in Linux. '''Usually the MTD partition dedicated to u-boot is protected against write in Linux''', so an update of the kernel is required before storing a new u-boot image. Updating U-Boot is not a common operation during the system lifetime, but sometimes it is required to solve some bugs or implement new features.
== Local upgrading ==
