25 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: https://download.01.org/gfx/ubuntu/16.04/main/dists/xenial/InRelease: Signature by key 09D6EF97BFB38E916EF060E756A3DEF863961D39 uses weak digest algorithm (SHA1)
jan@jan-System-Product-Name:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  libgloox14 libwildmidi2
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
  libgloox14 libwildmidi2
The following packages have been kept back:
  0ad gir1.2-javascriptcoregtk-3.0 gir1.2-webkit-3.0 gstreamer1.0-plugins-bad
  gstreamer1.0-plugins-bad-faad gstreamer1.0-plugins-bad-videoparsers
  libgstreamer-plugins-bad1.0-0 libjavascriptcoregtk-1.0-0
  libjavascriptcoregtk-1.0-dev libjavascriptcoregtk-3.0-0
  libjavascriptcoregtk-3.0-dev libopencv-calib3d2.4v5 libopencv-contrib2.4v5
  libopencv-core2.4v5 libopencv-features2d2.4v5 libopencv-flann2.4v5
  libopencv-imgproc2.4v5 libopencv-legacy2.4v5 libopencv-ml2.4v5
  libopencv-objdetect2.4v5 libopencv-video2.4v5 libwebkitgtk-1.0-0
  libwebkitgtk-3.0-0 libwebkitgtk-3.0-dev libwebkitgtk-dev
0 upgraded, 2 newly installed, 0 to remove and 25 not upgraded.
Need to get 0 B/445 kB of archives.
After this operation, 1,411 kB of additional disk space will be used.
Do you want to continue? [Y/n] y