set static network at debian system

1.vi /etc/network/interfaces
2.input content:
auto lo
iface lo inet loopback

allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 192.168.1.44
gateway 192.168.1.1
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255

3.ifdown eth0&&ifup eth0
4.vi boot_net.sh
5.input content:
	/sbin/ifup eth0
4.init 6
5. cd /etc/rcS.d/
6.ln -s /etc/network/boot_net.sh S30net
thanks your help.