Ubuntu dhcp3使用

将ip地址和mac地址关联起来，避免其他用户的随意使用。
/etc/dhcp3/dhcpd.conf
  deny unknown-clients;
  group{
    host pc1 {
      #pc1                                                                                                                
      hardware ethernet macaddress;
      fixed-address 192.168.1.1;
    }
  }