Set boot script order [closed]

I've been using So Linux Ubuntu since version 7.04, but I've used other distros before, and I realize that with each release something changes inexplicably, things that often get in the way. My problem is the following, I have some servers with the server version 8.04lts, and at the start of them I was in rc.local a script that did some tests and showed the result before presenting the login screen, it was on the screen , ie internet connection tests and others, in case of problem the user looked at the screen of the server on power up and you would see that when starting something wrong happened, this worked perfectly well, because in the boot order of the mentioned version rc. local was the last boot file to be executed, but with version 12.04 to the front this changed, the rc.local is executed in the middle of the process, so the result of my quick pass script en stays on the screen, this way it does not stay nothing functional for me, I would like to know how to make rc.local be the last to run at startup of So Linux ubuntu Server 14.04lts. Can you help me?