[root@linux ~]# vi /etc/dhcpd.conf
# 1. 骺ҳ]w
#    U subnet P host S]wɡAHo̪]wȬdzI
ddns-update-style               none;          <==ns DDNS ]w
default-lease-time              259200;        <==w] 3 
max-lease-time                  518400;        <==̤j 6 
option routers                  192.168.1.254; <==oNOw]
option broadcast-address        192.168.1.255; <==oOs}
option domain-name-servers      168.95.1.1, 139.175.10.20;
# WO DNS  IP ]wAoӳ]wȷ|קΤݪ /etc/resolv.conf ɮפeI
# ~AAiH]wh DNS DALnHry , zj}~C

# 2. ʺAt IP
#     Network_IP        Netmask_IP
subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.21 192.168.1.100;      <==t IP d
    option subnet-mask   255.255.255.0; <==iƳ]w netmask }
    option nis-domain    "vbird.tsai";  <==B~ NIS Ѽ
    option domain-name   "vbird.tsai";  <==b /etc/resolv.conf @ӷjM

    # 3. RA IP ڡI
    #    DW١
    host vbird-inside {
        hardware ethernet    00:40:95:30:43:B4; <==Τݺd MAC
        fixed-address        192.168.1.5;       <==Tw IP
    }
}
# ]wѼƷNqAЬd߫e@p`СAΪ man dhcpd.conf

[root@linux ~]# vi /etc/sysconfig/dhcpd
DHCPDARGS="eth0"

[root@linux ~]# vi /etc/init.d/dhcpd
# b 58 楪k|G
        daemon /usr/sbin/dhcpd ${DHCPDARGS} 2>/dev/null 

1. NҰʧaI
[root@linux ~]# /etc/init.d/dhcpd start

2. ݬݰfҰʪp
[root@linux ~]# netstat -tlunp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address PID/Program name
udp        0      0 0.0.0.0:67    0.0.0.0:*       7294/dhcpd

3. ݬݵnɪXT
[root@linux ~]# tail -n 30 /var/log/messages
Dec 5 10:58 linux dhcpd: Internet Systems Consortium DHCP Server V3.0.1
Dec 5 10:58 linux dhcpd: Copyright 2004 Internet Systems Consortium.
Dec 5 10:58 linux dhcpd: All rights reserved.
Dec 5 10:58 linux dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Dec 5 10:58 linux dhcpd: Wrote 0 deleted host decls to leases file.
Dec 5 10:58 linux dhcpd: Wrote 0 new dynamic host decls to leases file.
Dec 5 10:58 linux dhcpd: Wrote 0 leases to leases file.
Dec 5 10:58 linux dhcpd: Listening on LPF/eth0/00:40:fa:25:2a:db/192.168.1/24
Dec 5 10:58 linux dhcpd: dhcpd startup succeeded

Dec 5 11:11 linux dhcpd: /etc/dhcpd.conf line 10: semicolon expected.
Dec 5 11:11 linux dhcpd: subnet
Dec 5 11:11 linux dhcpd: ^
Dec 5 11:11 linux dhcpd: Configuration file errors encountered -- exiting

** You must add a ddns-update-style statement to /etc/dhcpd.conf.
   To get the same behaviour as in 3.0b2pl11 and previous
   versions, add a line that says "ddns-update-style ad-hoc;"
   Please read the dhcpd.conf manual page for more information. **

[root@linux ~]# vi /etc/hosts
127.0.0.1@@ localhost.localdomain localhost
192.168.1.254  vbird-server
192.168.1.5@  static-ip
192.168.1.21 @dynamic-021
192.168.1.22 @dynamic-022
.....
192.168.1.100  dynamic-100

[root@client ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=dhcp  <==NOLIwo@ӴNFI
ONBOOT=yes

[root@client ~]# /etc/init.d/network restart

1. DNS  IP |QʩOId\@U resolv.conf G
[root@linux ~]# cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search vbird.tsai          <==O_Oo]wL domain-name OH
nameserver 168.95.1.1      <==oNOڭ̭쥻]wȡC
nameserver 139.175.10.20

2. [@UѰաI
[root@linux ~]# route -n
Kernel IP routing table
Destination     Gateway        Genmask        Flags  Iface
192.168.1.0     0.0.0.0        255.255.255.0  U      eth0
169.254.0.0     0.0.0.0        255.255.0.0    U      eth0
0.0.0.0         192.168.1.254  0.0.0.0        UG     eth0
# ISIѤ]QTFIOKաI

3. ݤ@UΤݪOaI
[root@linux ~]# netstat -tlunp
Proto Recv-Q Send-Q Local Address  Foreign Address State  PID/Program name
udp        0      0 0.0.0.0:68     0.0.0.0:*              3996/dhclient
# ASݿITOӤp{bʴ DHCP suAoI

4. ݤ@ݥΤݯҰOTaI
[root@linux ~]# cat /var/lib/dhcp/dhclient-eth0.leases
lease {
  interface "eth0";
  fixed-address 192.168.1.100;  <==oNOԣڨCo IP OTwC
  option subnet-mask 255.255.255.0;
  option routers 192.168.1.254;
  option dhcp-lease-time 259200;
  option dhcp-message-type 5;
  option domain-name-servers 168.95.1.1,139.175.10.20;
  option dhcp-server-identifier 192.168.1.254;
  option nis-domain "vbird.tsai";
  option broadcast-address 192.168.1.255;
  option domain-name "vbird.tsai";
  renew 3 2006/12/6 18:15:41;   <==U@wps (renew) ɶI
  rebind 5 2006/12/8 05:26:26;
  expire 5 2006/12/8 14:26:26;
}
# oɮ׷|OӤdҴgnDL DHCP TInI
# SݥXӡALXGNPA]w /etc/dhcpd.conf H ^_^

5. B~ݤ@U NIS W٦S]wڡH
[root@linux ~]# nisdomainname
vbird.tsai   <==]ڭ̦]w nis-domain ذڡI

[root@linux ~]# cat /var/lib/dhcp/dhcpd.leases
lease 192.168.1.99 {  <==NO Windows 
  starts 2 2006/12/05 14:23:37;
  ends 5 2006/12/08 14:23:37;
  binding state active;
  next binding state free;
  hardware ethernet 00-d0-18-af-6e-81;
  uid "\001\000\340\030\257n\003";
  client-hostname "vbird_work";
}
lease 192.168.1.100 { <==NO Linux 
  starts 2 2006/12/05 15:37:33;
  ends 5 2006/12/08 15:37:33;
  binding state active;
  next binding state free;
  hardware ethernet 00:30:20:1d:c3:6e;
}

[root@linux ~]# gcc -O -Wall -o ether-wake ether-wake.c

[root@linux ~]# ./ether-wake 11:22:33:44:55:66

# h\iHoˬd\G
[root@linux ~]# ./ether-wake -u