# cat /etc/issue
Ubuntu 14.04 LTS \n \l
# service  networking restart
stop: Job failed while stopping
start: Job is already running: networking
# tail -f /var/log/upstart/networking.log
Stopping or restarting the networking job is not supported.
Use ifdown & ifup to reconfigure desired interface.

# ifdown eth0 && ifup eth0

# ifdown --exclude=lo -a && sudo ifup --exclude=lo -a

# apt-get install bridge-utils
# cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto br0
iface br0 inet static
address 192.168.0.10
netmask 255.255.255.0
gateway 192.168.0.1
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
dns-nameservers 192.168.0.1
# ifup br0
# brctl  show
bridge name   bridge id       STP enabled interfaces
br0       8000.02000a0080e1   no      eth0