/etc/rc.d/rc.local にスクリプト記述すればOK。
以下のような感じ
$ cat /etc/rc.d/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff./path/to/script.sh
以上
