[Novalug] where to put commands to be executed at boot time

[Nino Pereira]

List,

every time I reboot my Ubuntu (8.10) system I have to re-type,
by hand, the addresses of my fixed IP address, the gateway, etc.

sudo ifconfig eth0 xxx.xxx.xxx.xxx
sudo route add xxx.xxx.xxx.1 eth0
sudo route add default gw xxx.xxx.xxx.x

On Redhat/Fedora these commands should be put in a file
like /etc/rc.d/rc.local, I can't find these files.
They may sit in a similarly-looking file in /etc/init.d,
which has all kinds of files with enticing names, but none
that calls out: 'put the IP address info in me'.

Any suggestions? How would you ensure that the fixed IP address
either doesn't disappear or comes back automatically on reboot?

Thank you,

Nino