criar /etc/init.d/alix-heartbeat e colocar neste ficheiro o seguinte:
#! /bin/sh
### BEGIN INIT INFO
# Provides: alix-heartbeat_init
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Configure leds on alix board
# Description: Configure leds on alix board
### END INIT INFO
echo heartbeat > /sys/class/leds/alix\:1/trigger
echo ide-disk > /sys/class/leds/alix\:2/trigger
echo netdev > /sys/class/leds/alix\:3/trigger
echo eth0 > /sys/class/leds/alix\:3/device_name
echo "link tx rx" > /sys/class/leds/alix\:3/mode

tornar o script executável:
chmod +x /etc/init.d/alix-heartbeat

instalar o script:
update-rc.d alix-heartbeat defaults

http://ubuntuforums.org/showthread.php?t=1381446