Kali Unable to locate package

There might be instances where kali can’t locate packages at all. Fix below:

Step 1) sudo mousepad /etc/apt/sources.list

1. Add # in front of all existing lines
2. Add the following line without #
   deb http://http.kali.org/kali kali-rolling main contrib non-free non-free-firmware

Step 2) sudo apt-get update

Step 3) sudo apt install <package>