Removing libdbd-mysql-perl (4.028-2) ...
Removing libmysqlclient18:amd64 (5.6.27-0ubuntu1) ...
Purging configuration files for libmysqlclient18:amd64 (5.6.27-0ubuntu1) ...
Removing mysql-common (5.6.27-0ubuntu1) ...
Purging configuration files for mysql-common (5.6.27-0ubuntu1) ...
update-alternatives: error: no alternatives for my.cnf
dpkg: error processing package mysql-common (--purge):
 subprocess installed post-removal script returned error exit status 2