I have just set up a Docker container with an
ubuntu:latest image. This image is, according to
/etc/lsb-release an Ubuntu 14.04. Now I would like to upgrade the system in my container to Ubuntu 16.04. Therefore, I have installed the
update-manager-core package. However, when I run
do-release-upgrade, I just receive the following output:
root@container:~# do-release-upgrade Checking for a new Ubuntu release No new release found
Why doesn't this work at the moment? Will it work at all at some point? What are the most convenient ways in order to upgrade the container from Ubuntu version 14.04 to 16.04? Do I have another possibility than creating a new container with Ubuntu 16.04 and copy all data from the old container to the new container?