Neither of these things are technically insurmountable but it is a
question of whether you want them to spend time and effort trying to
get this to work and answering the inevitable questions from
situations where it doesn't work or taking the simple brute-force way
to upgrading and spending more effort on the actual content of the
upgrades.

Reflashing the device is a fine thing, but it's rather annoying to reinstall all the stuff back, so before doing anything I prefer to ask here: provided I have everything installed the "normal" way (on the internal memory: not used the trick of extending the root filesystem on the MMC), is it possible to flash the device and re-set it up like it was before reflashing, without having to re-install everything manually?

So, let's say, is it possible to backup some directories and files via ssh, flash the device, reinstall the ssh server and write the backed up stuff into the flashed device, in order to have everything working again with minimum effort? If yes, can someone write a list of the dirs/files to include (or exclude) in the backup in order to accomplish this task? It seems linux is rather good for this kind of things, but I don't know well what to backup'n'overwrite after the reflash and what to exclude, so wise advice here is really appreciated. It would be nice a command to tar all the stuff needed directly from the device to the PC via ssh (the "backup" step), if that's possible, and the corresponding reverse command for the "restore" step.

--
Antonio
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