I was under the impression you can write scripts and put them in /etc/init/apps. But I can't seem to get mine to work. I would like to write one to delete /home/user/.local/share/applications/simatk.desktop at startup, which is a useless app put there by my SIM card provider and which is recreated at every startup if it is not present.

Is there a tutorial somewhere or can we have a little thread to walk through writing scripts to run at startup and solve problems, etc?