Installing and configuring DHCP on Debian

Step 1: Install DHCP package

aptitude install dhcp3-server

Step 2: Configure DHCP package

option domain-name "domain.com";
option domain-name-servers 10.0.0.2, 193.10.10.10;
option routers 10.0.0.1;
default-lease-time 3600;
subnet 10.0.0.0 netmask 255.0.0.0 {
arrange 10.0.0.100 10.0.0.254;

#OPTIONS
#if you want to assign IP based on MAC address
host imran {
hardware ethernet 00:50:BA:82:DE:63;
fixed-address 10.10.10.10;
}
}

Step 3: Restart

/etc/init.d/dhcp3-server restart

Further Docs

http://www.debianhelp.co.uk/dhcp.htm