# /usr/lib/update-notifier/apt-check --human-readable
0 packages can be updated.
0 updates are security updates.

# apt-get dist-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:
  linux-headers-4.4.0-96 linux-headers-4.4.0-96-generic
  linux-image-4.4.0-96-generic linux-image-extra-4.4.0-96-generic
Use 'apt-get autoremove' to remove them.
The following packages will be upgraded:
  postfix
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,088 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] n
Abort.