.

Run these commands:

sudo echo "deb http://http.kali.org/kali kali-rolling main non-free contrib" >> /etc/apt/sources.list

sudo echo "deb-src http://http.kali.org/kali kali-rolling main non-free contrib">> /etc/apt/sources.list

sudo wget https://archive.kali.org/archive-key.asc -O /etc/apt/trusted.gpg.d/kali-archive-keyring.asc

sudo apt update

When you loose track of what t00ls you have installed, use this command:

comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc /var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort -u)