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