ifconfig

/etc/network/interfaces
—————————————————-
auto eth0
iface eth0 inet static
address xxx.xxx.xxx.xxx
netmask 255.255.255.0
gateway xxx.xxx.xxx.1
dns-nameservers xxx.xxx.xxx.xxx
——————————————————
networkrestart
#/etc/init.d/networking restart
——————————————————
/etc/NetworkManager/NetworkManager.conf 

[ifupdown]
managed=true

sudo service network-manager restart\