root@hal:~# apt-get update
Hit http://security.debian.org stretch/updates InRelease
Hit http://security.debian.org stretch/updates/main amd64 Packages
Hit http://security.debian.org stretch/updates/contrib amd64 Packages
Hit http://security.debian.org stretch/updates/non-free amd64 Packages
Hit http://security.debian.org stretch/updates/contrib Translation-en
Hit http://security.debian.org stretch/updates/main Translation-en
Hit http://security.debian.org stretch/updates/non-free Translation-en
Ign http://deb.debian.org stretch InRelease
Hit http://deb.debian.org stretch-updates InRelease
Hit http://deb.debian.org stretch Release.gpg
Get:1 http://deb.debian.org stretch-updates/main amd64 Packages/DiffIndex [2,212 B]
Hit http://deb.debian.org stretch-updates/contrib amd64 Packages
Hit http://deb.debian.org stretch-updates/non-free amd64 Packages
Hit http://deb.debian.org stretch-updates/contrib Translation-en
Get:2 http://deb.debian.org stretch-updates/main Translation-en/DiffIndex [2,212 B]
Hit http://deb.debian.org stretch-updates/non-free Translation-en
Hit http://deb.debian.org stretch Release
Hit http://deb.debian.org stretch/main amd64 Packages
Hit http://deb.debian.org stretch/contrib amd64 Packages
Hit http://deb.debian.org stretch/non-free amd64 Packages
Hit http://deb.debian.org stretch/contrib Translation-en
Hit http://deb.debian.org stretch/main Translation-en
Hit http://deb.debian.org stretch/non-free Translation-en
Fetched 4,424 B in 2s (1,913 B/s)
Reading package lists... Done
root@hal:~# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  bind9 bind9-host bind9utils dnsutils lwresd
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
root@hal:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not