Explore features › With a built-in firewall and virus protection software, Ubuntu is one of the most secure operating systems around.And the long-term support releases give you five years of security patches and updates.Simply logging out and logging back in doesn't load the new drivers.
For virtual machines or managed servers hosted by other providers, you should keep in mind that losing SSH connectivity is a risk, particularly if you don't have another means of remotely connecting to the system's console.
You must restart your computer to load the modules.
For further stability of a LTS release there is a slight change in behaviour if you are currently running a LTS version.
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