Date: 2016aug30 OS: RedHat/Fedora/CentOS Q. How can I run a command at boot / startup ? A. As root, put the commands you want to run in:

/etc/rc.d/rc.local

eg:

#!/bin/sh echo system started | mail root

And make it executable:

chmod a+x rc.local

This is the way it worked before systemd and it continues to work this way with systemd (There's an rc-local.service but you don't need to mess with it).