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Changes
→Linux-based upgrading
* When the '''network is unavailable''', a typical approach is to provide the end-user with a storage device (e.g. usb pen drive or SD card) with the software upgrade packages. This device can then be plugged to the system to run the upgrade.
* When preparing the final '''root file system''', it's fundamental to add '''all the application binaries and libraries ''' required to implement the upgrade procedures.
* It's always possible to access the u-boot environment variables from user space, both for read and write operations. These operations can be performed using the '''fw_printenv/fw_setenv''' programs contained in the tools/env directory of the u-boot sources.
