Public bug reported:

I did an upgrade with "sudo apt-get dist-upgrade", and it removed 
network-manager and network-manager-gnome. I could not connect to my LAN afer 
that. I was able to find instructions for downgrading the libnl packages at

I am able to get online again by running the following commands
sudo ifconfig eth0 up
sudo dhclient eth0
(Fortunately, I have a Ethernet I can plug in to.) I have to do this every time 
I reboot. This is inconvenient as a usually use Desktop Sharing with another 
computer as the client. I use an SSH tunnel for security. This means that every 
time I reboot, I have to physically access the computer's console to enter the 
ifconfig and dhclient commands to get the computer back on the network. I tried 
to reinstall network-manager and network-manager-gnome, but the command results 
said there were dependencies that prevented the installation. The fixes in the 
web page referenced above do not help, so I'm reporting this as a bug.

Thanks for your assistance.

$ sudo lsb_release -rd
[sudo] password for wally: 
Description:    Ubuntu 14.04.1 LTS
Release:        14.04

$ apt-cache policy network-manager
  Installed: (none)
  Version table: 0
        500 trusty-security/main amd64 
        100 /var/lib/dpkg/status 0
        500 trusty/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager (not installed)
ProcVersionSignature: Ubuntu 3.13.0-144.193-generic 3.13.11-ckt39
Uname: Linux 3.13.0-144-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.27
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Apr  6 21:21:27 2018
InstallationDate: Installed on 2014-10-22 (1262 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
 PATH=(custom, no user)
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug trusty

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  Have to manually "sudo ifconfig eth0 up" and "sudo dhclient eth0"
  after every reboot

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