The tutorial suggests to rename blink.sh into something different, but how is it run initially?
I looked through /mnt/system/auto.sh - blink.sh was not mentioned there.
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ha-ha, just found it, it’s in /etc/ S99user 
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I think you mean /etc/init.d/S99user. I say thay just in case someone else has the same question.
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The important detail is that since BuildRoot (wisely, IMO) doesn’t use systemd, everything starts at /etc/inittab
MarkMLl
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