Hola por favor si medan una ayudita para configurar internet y red, tengo el siguente problema e ingresado:
ifconfig
y he observado que tengo una ip 192.168.1.33
luego
1- ingrese sudo nano /etc/network/interfaces
para modificar remplazar el contenido por este:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
script grep
map eth0
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168..40
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.1.44
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1
# The primary network interface
auto eth0:0
iface eth0:0 inet static
address 192.168.1.45
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1

luego he guardado los cambios
y para setear escribi el siguiente commando
sudo /etc/init.d/networking restart
me sale:
command not found

Y cuando ejecuto:
ifconfig
No sale nada
No se cual seria el problema

Attentamente

Nicola