package mysql-common 5.6.23-1~exp1~ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

From log:

Setting up mysql-common (5.6.23-1~exp1~ubuntu3) ...
update-alternatives: error: alternative path /etc/mysql/my.cnf.fallback doesn't exist
dpkg: error processing package mysql-common (--configure):
 subprocess installed post-installation script returned error exit status 2

Thank you for taking the time to report this bug and helping to make Ubuntu better.

Since it seems likely to me that this is a local configuration problem, rather than a bug in Ubuntu, I'm marking this bug as Incomplete.

Specifically, the error message says that /etc/mysql/my.cnf.fallback does not exist but this is shipped by the same package. Have you removed your /etc/mysql directory?

If indeed this is a local configuration problem, you can find pointers to get help for this sort of problem here: http://www.ubuntu.com/support/community

Or if you believe that this is really a bug, then you may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to New.

> Have you removed your /etc/mysql directory?

I have done that to try to fix another problem related to installing mysql-server-5.6 after having installed (and subsequently removed) mariadb 10.0. However, the removal of that directory was done after removing the mysql-server package, so I was expecting that installing the package again would re-create it. It seems to have done that as I can see that directory in my system, however this error is still present.

What are the consequences of manually removing this directory?

My mysql instance was failing to start in my VM instance (Ubuntu 15.04). So I uninstalled mysql-server then removed /var/lib/mysql /var/log/mysql /etc/mysql.

I had hoped that a clean re-install would fix the startup problem, but now I have another problem due to this bug. I see the same error messages that are reported above.

[Expired for mysql-5.6 (Ubuntu) because there has been no activity for 60 days.]