Problem Solving: kali in [apt-get install the software name] command fails: Unable to locate package Software name

Question: Kali install the software fails

problem solved:

View source list

Adding content is as follows:

deb http://http.kali.org/kali kali-rolling main contrib non-free
deb http://old.kali.org/kali sana main non-free contrib
deb http://old.kali.org/kali moto main non-free contrib

Update Source

……

Update Package

Software installation is successful!