
Open /etc/apt/sources.list for editing in nano text editor: sudo nano /etc/apt/sources.list

You don't need the repositories that the Katoolin script added anymore, so restore your sources.list file in /etc/apt/sources.list back to the default for a fresh installation of Ubuntu 18.04. The Katoolin script is the cause of some of your problems. The LionSec Katoolin GitHub webpage clearly warns Katoolin users to be careful when updating software.īefore updating your system, please remove all Kali-linux repositories to avoid any kind of problem.Īll kinds of problems can occur if you don't do this.

Warning about updates after installing Kali linux tools
