1. 현재 네트웍 인터 페이스를 출력

blue# ifconfig -a
lo0: flags=849 mtu 8232
       inet 127.0.0.1 netmask ff000000
le0: flags=863 mtu 1500
       inet 203.239.175.2 netmask ffffff00 broadcast 203.239.175.255
       ether 8:0:20:82:bf:4f

2. 만약  IP address를 203.239.175.3으로 바꿀경우

blue# vi /etc/hosts
#
# Internet host table
#
127.0.0.1       localhost
203.239.175.2   blue.sjic.co.kr blue    loghost


변경후
127.0.0.1           localhost
203,239,175,3    blue.sjic.co.kr blue loghost
# reboot

rebooting 후

blue# ifconfig -a
lo0: flags=849 mtu 8232
       inet 127.0.0.1 netmask ff000000
le0: flags=863 mtu 1500
       inet 203.239.175.3 netmask ffffff00 broadcast 203.239.175.255
       ether 8:0:20:82:bf:4f

/etc/hostname.le0 (10 Mb) , /etc/hostname.hme0(100 Mb) 에있는 hostname과 /etc/hosts file에있는
hostname이 동일 해야함

# cat /etc/hostsname.le0
blue


3. defaultrouter의 IP address변경

# vi /etc/defaultrouter
  203.239.175.1        -> 이어드레스를 변경

# reboot을 하거나
# route add net default 203.239.175.254 1

4. netmask 변경

# vi /etc/netmasks

  128.253.0.0     255.255.255.0
  158.233.0.0     255.255.255.192

5.nameserver 변경

blue# more /etc/resolv.conf
domain sjic.co.kr
nameserver 203.239.175.1    -> 이 IP address를 변경


blue# more /etc/nsswitch.conf
#
# /etc/nsswitch.files:
#
# An example file that could be copied over to /etc/nsswitch.conf; it
# does not use any naming service.
#
# "hosts:" and "services:" in this file are used only if the
# /etc/netconfig file has a "-" for nametoaddr_libs of "inet" transports.

passwd:     files
group:      files
hosts:      files dns
networks:   files
protocols:  files
rpc:        files
ethers:     files
netmasks:   files
bootparams: files
publickey:  files
# At present there isn't a 'files' backend for netgroup;  the system will
#   figure it out pretty quickly, and won't use netgroups at all.
netgroup:   files
automount:  files
aliases:    files
services:   files
sendmailvars:   files
blue#