Ubuntu 16.04: unattended task eating CPU
Solution 1:
I found this answer in another post. Apparently with 16.04 an automatic apt-get update & upgrade that is performed twice a day. https://github.com/chef/bento/issues/609
I have not addressed this problem on my install as yet, but wanted to relay this information.
dpkg and apt-get were unlocked on my install after a 5 minute delay after startup.