This problem is mentioned in https://bugs.launchpad.net/ubuntu/+source
/update-notifier/+bug/545398
The work-around is to delete the file /etc/motd.tail which contains the
old/stale updates information. It is this old information that is being
displayed at login.
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You received this bug notifi
Public bug reported:
happens on startup
ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libstdc++6:amd64 5.4.0-6ubuntu1~16.04.5
ProcVersionSignature: Ubuntu 4.10.0-35.39~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-35-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2