Running updates is mission critical for any server.  When you complete any updates for your server, you are patching any known security vulnerabilities and closing any loopholes for those unwanted guest.

Below is a list of commands that you can run from your virtual server to update to the latest version.

1. CentOS
   # yum update
   
   
2. Debian
   # aptitude update
   # aptitude dist-upgrade
   
   
3. Fedora
   # yum update
   
   
4. Ubuntu
   # sudo apt-get upgrade
   
   
5. OpenSUSE
   # zypper refresh
   # zypper update

We recommend running these update commands at least once a week at a minimum or once a month at the longest.