Run script on startup, shutdown or reboot on Ubuntu

Isn’t there always a need to run some command or program at startup? It’s easy on Windows with it’s startup folder, but what about on a Linux server? What’s the proper method to run a script at startup on Ubuntu?

Linux has different run levels, each designating a different user group with certain permissions. Some are exclusive for system processes, while others are available to regular users and admins. The file containing startup commands and the one we look at in ...