Adding a startup script to be run at bootup - ubuntu

513 mkdir startup
514 mv iptable-rules.20101124 startup/
515 cd startup/
516 ll
517 vim mybootup.sh
518 ll
519 cp mybootup.sh /etc/init.d/
520 chmod +x /etc/init.d/mybootup.sh
521 update-rc.d mybootup.sh defaults