At start my situation was similar to this: A new version of configuration file /etc/default/grub is available, but the version installed currently has been locally modified
I don't know why but I thought It would be like solving a git conflict so I choose "start a new shell to examine the situation".
I am not able to re-start apt-get upgrade
.
root@mygroup-03074302:/# sudo apt-get upgrade
sudo: unable to resolve host mygroup-03074302
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
This is a brand new VM I have not modified grub personally.