Most microcontroller projects have an on/off switch or some quick way to cut power, while computers like the Raspberry Pi require an orderly shutdown procedure…otherwise the SD card may become corrupted and the system will no longer boot.
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Thanks for the article. I’m surprised in the 14+ years since I wrote my Embedded Linux book that RO operation isn’t an installable package or standard option (particularly with millions running raspberry pis, beaglebones,g etc). People are still doing this by hand, or a script in this case.