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Install the dhcp3-server package with Synaptic(See How do I use Synaptic to install packages?)

sudo cp /etc/default/dhcp3-server /etc/default/dhcp3-server_backup 
sudo gedit /etc/default/dhcp3-server

Find this line

... INTERFACES=""

Replace with the following line

INTERFACES="eth0"

Save the edited file (How do I install a DHCP Server?)

sudo cp /etc/dhcp3/dhcpd.conf /etc/dhcp3/dhcpd.conf_backup 
sudo gedit /etc/dhcp3/dhcpd.conf

Find this section

...
    # option definitions common to all supported networks...
    option domain-name "example.org";
    option domain-name-servers ns1.example.org, ns2.example.org;
    
    default-lease-time 600;
    max-lease-time 7200;
...

Replace with the following lines

# option definitions common to all supported networks...
#option domain-name "example.org";
#option domain-name-servers ns1.example.org, ns2.example.org;

#default-lease-time 600;
#max-lease-time 7200;

Find this section

...
# A slightly different configuration for an internal subnet.
#subnet 10.5.5.0 netmask 255.255.255.224 {
#  range 10.5.5.26 10.5.5.30;
#  option domain-name-servers ns1.internal.example.org;
#  option domain-name "internal.example.org";
#  option routers 10.5.5.1;
#  option broadcast-address 10.5.5.31;
#  default-lease-time 600;
#  max-lease-time 7200;
#}
...

Replace with the following lines

# A slightly different configuration for an internal subnet.
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.100 192.168.0.200;
option domain-name-servers 202.188.0.133, 202.188.1.5;
option domain-name "tm.net.my";
option routers 192.168.0.1;
option broadcast-address 192.168.0.255;
default-lease-time 600;
max-lease-time 7200;
}

Save the edited file (sample/dhcpd.conf_installdhcpserver)

sudo /etc/init.d/dhcp3-server restart