Removing unity-control-center (15.04.0+16.04.20171130-0ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
dpkg: cycle found while processing triggers:
 chain of packages whose triggers are or may be responsible:
  man-db -> desktop-file-utils
 packages' pending triggers which are or may be unresolvable:
  man-db: /usr/share/man
  desktop-file-utils: /usr/share/applications
  gconf2: /usr/share/GConf/gsettings
  ufw: /etc/ufw/applications.d
dpkg: error processing package man-db (--remove):
 triggers looping, abandoned