I made a mistake, yum is a different package manager, you can use the following
In case you want to do it the easy way
Accessories ~ root shell [or just a shell and type the following in any shell]
sudo aptitude safe-upgrade
You'll be asked for the root password.
OR if you would like nothing new installed, simply the latest of what you have --
sudo aptitude --no-new-installs safe-upgrade
Poof , system will search for updates, and implement them , so that the rest of your system is not negatively effected. Done.
Updated to the latest version of the stable release.