That's right tshering.
After a first test with the delay, it doesn't work.
A second test, modifying /etc/init.d/rcS worked one time. My script in the .kobo directory has been launched.
But I did a mistake somewere, at the next test I bricked my Kobo
I'm restauring the SD before making other tests.
Just a question to be sure.
The call of my script in rcS should be in background (& at the end of the line, maybe nohup at the begin of line) ?
I suppose yes, because if I want to clean rcS in my script (called by rcS), it should be impossible if it's running ...