Update Notifier

[sarez45]

Why doesn't Debian 8 Cinnamon notify when updates are ready to install after 
all these years Debian has existed? Don't tell me there is one, because after 
installing Debian I waited a long time to see if a notification would pop up. 
It never did. I know about doing apt-get update && apt-get upgrade,but why 
should we have to use a command line? It makes me wonder about Debian security. 
Would you please put an update notifier in all your versions of Debian.