Fichier /etc/rc.local
#!/bin/sh e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
/bin/setserial /dev/ttyS0 port 0x0338 irq 4 autoconfig
exit 0