4.3BSD-Tahoe/etc/netstart

#!/bin/sh -
#
#	@(#)netstart	5.5 (Berkeley) 5/10/89

routedflags=-q
rwhod=NO

# myname is my symbolic name
# my-netmask is specified in /etc/networks
#
hostname=myname.my.domain

ifconfig imp0 inet $hostname
ifconfig ace0 inet $hostname netmask my-netmask
ifconfig ex0 inet $hostname netmask my-netmask

# for en enthernet interface, load microcode before ifconfig
# /etc/enpload /dev/enp0ram /etc/enpcode	> /dev/console 2>&1
ifconfig en0 inet $hostname netmask my-netmask

ifconfig lo0  inet localhost
route add $hostname localhost 0