If you run your own server, you probably already know this command:
sudo apt-get update
What you might not realize is that it actually doesn’t upgrade anything you installed. It only updates the list of packages and their versions. It does not install or upgrade anything. Therefore it’s helpful if you run the following command next:
sudo apt-get upgrade
This will install any updates and security fixes available for the packages you have installed! I’ve had 3 people ask me about this in the last hour, so it’s always good to make sure you run this regularly. I typically find myself running it at least once a month, depending on what’s been updated.
Keep your server and sites updated!!