How to do it...

To bring an existing Kali Linux installation up to date, you will do the following:

1. From the main Kali desktop, let's click on the terminal icon in the upper-left part of the screen:

1. From the Command Prompt, type this:

 apt-get update

1. Once complete, we will actually upgrade the system by entering the following at the Command Prompt:

 apt-get upgrade

1. After a minute or two, you will get a screen explaining what will be upgraded and what needs to be installed for the upgrades to occur. When ready to continue, type Y and press Enter:

1. Once complete, we will reboot the system to ensure we have a fresh running environment. To continue, type this:

 shutdown -r now