E: Unable to locate package on kali linux error [SOLVED]

This post about repository issues
some times when you want  to install software by terminal like (" sudo apt-get install codeblock")    you get  "E: Unable to locate package"  Error

 To solve this problem 


  1. open terminal

  2. run this command "leafpad /etc/apt/sources.list"

  and replace with this

#

# deb cdrom:[Debian GNU/Linux 2016.1 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 2$

# deb cdrom:[Debian GNU/Linux 2016.1 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 2$

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

deb-src http://http.kali.org/kali kali-rolling main non-free contrib

deb http://ftp.be.debian.org/debian/ wheezy main
save and close the file

after that

1. sudo apt-get clean

2. sudo apt-get update

3. sudo apt-get -f install

now you can install what you want 
if you face any kind of problem you can ask me in comment section