[Ubuntu] Networking service

Environment : Ubuntu 14.04

Problem :

  1. Failure to restart networking service
  2. Interface eth# not configured

For the first problem, when I try to restart networking service with the commands :

sudo /etc/init.d/networking restart

And

sudo service networking restart

I got this message :

stop: Job failed while stopping
start: Job is already running: networking

Solution is we can restart with force by using command (# : the number of network interface) :

sudo ifdown eth# && sudo ifup eth#

The second problem is following by the first, when typing the solution command, another error message came out :

ifdown: interface eth# not configured

The solution is to add the interface into its configuration file (I used vim here) :

sudo vim /etc/network/interfaces

by adding something like (if your ip address is distributed by DHCP):

auto eth#
iface eth# inet dhcp

Active your network interface that u just added :

sudo ifup eth#

Check your work by using ifconfig, u will see the result.

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