~$ sudo apt autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED
  fltk1.3-doc fluid gir1.2-gtk-2.0 hddtemp libatk1.0-dev libfltk-cairo1.3
  libfltk-forms1.3 libfltk-gl1.3 libfltk-images1.3 libfltk1.3 libfltk1.3-dev
  libgdk-pixbuf2.0-dev libgl2ps-dev libgtk2.0-dev libhdf5-mpi-dev
  libhdf5-openmpi-dev libopenni-dev libopenni-sensor-pointclouds0 libopenni0
  libopenni2-0 libopenni2-dev libpango1.0-dev libpcl-apps1.8 libpcl-common1.8
  libpcl-features1.8 libpcl-filters1.8 libpcl-io1.8 libpcl-kdtree1.8
  libpcl-keypoints1.8 libpcl-ml1.8 libpcl-octree1.8 libpcl-outofcore1.8
  libpcl-people1.8 libpcl-recognition1.8 libpcl-registration1.8
  libpcl-sample-consensus1.8 libpcl-search1.8 libpcl-segmentation1.8
  libpcl-stereo1.8 libpcl-surface1.8 libpcl-tracking1.8
  libpcl-visualization1.8 libqt5quickparticles5 libqt5quicktest5
  libqt5webkit5-dev libvtk6-java libvtk6-jni libxcomposite-dev libxft-dev
  libxml2-utils linux-hwe-5.4-headers-5.4.0-66 openni-utils python-cairo
  python-opengl python-pydot python3-click python3-colorama qtdeclarative5-dev
  qttools5-private-dev ros-melodic-actionlib-tutorials ros-melodic-bond-core
  ros-melodic-bondpy ros-melodic-camera-calibration ros-melodic-cmake-modules
  ros-melodic-common-msgs ros-melodic-common-tutorials
  ros-melodic-compressed-depth-image-transport
  ros-melodic-compressed-image-transport ros-melodic-controller-manager
  ros-melodic-depth-image-proc ros-melodic-desktop
  ros-melodic-diagnostic-aggregator ros-melodic-diagnostic-analysis
  ros-melodic-diagnostic-common-diagnostics ros-melodic-diagnostics
  ros-melodic-diff-drive-controller ros-melodic-eigen-conversions
  ros-melodic-executive-smach ros-melodic-filters
  ros-melodic-gazebo-ros-control ros-melodic-gazebo-ros-pkgs
  ros-melodic-geometry ros-melodic-geometry-tutorials
  ros-melodic-gl-dependency ros-melodic-image-common
  ros-melodic-image-geometry ros-melodic-image-pipeline ros-melodic-image-proc
  ros-melodic-image-publisher ros-melodic-image-rotate
  ros-melodic-image-transport-plugins ros-melodic-image-view
  ros-melodic-interactive-marker-tutorials ros-melodic-joint-limits-interface
  ros-melodic-joint-state-controller ros-melodic-kdl-conversions
  ros-melodic-kdl-parser-py ros-melodic-laser-assembler
  ros-melodic-laser-filters ros-melodic-laser-pipeline
  ros-melodic-librviz-tutorial ros-melodic-mk ros-melodic-nodelet-core
  ros-melodic-nodelet-topic-tools ros-melodic-nodelet-tutorial-math
  ros-melodic-pcl-msgs ros-melodic-pluginlib-tutorials
  ros-melodic-position-controllers ros-melodic-qt-dotgraph ros-melodic-qt-gui
  ros-melodic-qt-gui-cpp ros-melodic-qt-gui-py-common
  ros-melodic-qwt-dependency ros-melodic-robot
  ros-melodic-robot-state-publisher ros-melodic-ros ros-melodic-ros-base
  ros-melodic-ros-comm ros-melodic-ros-core ros-melodic-ros-tutorials
  ros-melodic-rosbash ros-melodic-rosboost-cfg ros-melodic-roscpp-core
  ros-melodic-roscpp-tutorials ros-melodic-roscreate ros-melodic-roslang
  ros-melodic-roslint ros-melodic-roslisp ros-melodic-rosmake
  ros-melodic-rospy-tutorials ros-melodic-rqt-action ros-melodic-rqt-bag
  ros-melodic-rqt-bag-plugins ros-melodic-rqt-common-plugins
  ros-melodic-rqt-console ros-melodic-rqt-dep ros-melodic-rqt-graph
  ros-melodic-rqt-gui ros-melodic-rqt-gui-cpp ros-melodic-rqt-gui-py
  ros-melodic-rqt-image-view ros-melodic-rqt-launch
  ros-melodic-rqt-logger-level ros-melodic-rqt-moveit ros-melodic-rqt-msg
  ros-melodic-rqt-nav-view ros-melodic-rqt-plot ros-melodic-rqt-pose-view
  ros-melodic-rqt-publisher ros-melodic-rqt-py-common
Removing sbcl (2:1.4.5-1) ...
Removing tcl-dev:amd64 (8.6.0+9) ...
Removing tcl-vtk6 (6.3.0+dfsg1-11build1) ...
Removing tcl8.6-dev:amd64 (8.6.8+dfsg-3) ...
Removing x11proto-composite-dev (1:2018.4-4) ...
Removing libpcl-common1.8:amd64 (1.8.1+dfsg1-2ubuntu2.18.04.1) ...
Removing ros-melodic-image-geometry (1.13.0-0bionic.20210112.181545) ...
Removing ros-melodic-qt-gui-py-common (0.4.2-1bionic.20201017.061735) ...
Removing ros-melodic-rqt-console (0.4.9-1bionic.20210112.184043) ...
Removing ros-melodic-rqt-logger-level (0.4.8-0bionic.20201017.122413) ...
Removing ros-melodic-rqt-py-common (0.5.2-1bionic.20210112.182710) ...
Removing ros-melodic-rqt-gui-py (0.5.2-1bionic.20201017.120327) ...
Removing ros-melodic-rqt-gui (0.5.2-1bionic.20201017.102836) ...
Removing ros-melodic-qt-gui (0.4.2-1bionic.20201017.061712) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for libc-bin (2.27-3ubuntu1.4) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for shared-mime-info (1.9-2) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for mime-support (3.60ubuntu1) ...