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I am currently running a script at startup using /etc/rc.local. The problem is that during shutdown, it does not exit gracefully. This can cause (important) data loss. My script has a SIGINT handler to finish all jobs before exiting, is there any way to start the script during startup AND send a SIGINT to the script (and wait for it to finish) before shutdown?

Note: I could manually send a SIGINT to the script before shutting it down but I will not be administrating this server and there's no telling what someone in the future might do.

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First, chmod +x to your script.Thensudo ln -s yourscript /etc/init.d/somename, sudo ln -s /etc/init.d/somename /etc/rc0.d/K88somename.When you input init 0 to shutdown the machine,your script will be executed. The same to rcX.d,X means the runlevel. My OS is Ubuntu 14.04 LTS。 In my OS,it work as i wish(maybe other also be fine,but i don't try).

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    I read a bit about rc[0-6]. I'm assuming it waits for the script in the rc0.d directory to complete before shutdown? Does shutdown also encompass restarts? – Mocking Apr 15 '16 at 6:44
  • @Mocking Does shutdown also encompass restarts?NO! If you input "init 0",the rc0.d whill be exec.If you input "reboot",the rc6.d whill be exec – user164825 Apr 18 '16 at 3:09

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