What's the name of the program that tells you how many packages need to be updated?

what's the name of the program that tells you how many packages need to be updated when you log in? I have it on some machines but not on others.

For example, it will say (from memory):

10 packages need updating 5 security patches

etc.


For text mode logins the file /etc/motd ("message of the day") is displayed after login. This file is created at startup based on the scripts in /etc/update-motd.d/.

The message about available updates is created by /etc/update-motd.d/90-updates-available which just calls /usr/lib/update-notifier/update-motd-updates-available