How to cancel "update-rc.d myscript defaults"?

https://askubuntu.com/questions/228304/how-do-i-run-a-script-at-start-up

I followed this link

Now I want to cancel it.

How Can I Cancel “update-rc.d myscript defaults” command?

You may try:

update-rc.d myscript remove

Note: you probably need to do that with sudo.

This might be useful…here’s a man page on update-rc.d:
http://manpages.ubuntu.com/manpages/precise/man8/update-rc.d.8.html