deb http://http.kali.org/kali kali main contrib non-free deb http://security.kali.org/kali-security kali/updates main contrib non-free deb cdrom:[Debian GNU/Linux 7.0 Kali - Official Snapshot i386 LIVE/INSTALL Binary 20130905327-07:57]/ kali contrib main non-free
Here is what the above code is Doing:
1. We are creating a variable called sources_file and assigning it the value of the file /etc/apt/sources.list.
2. We are opening the file in read mode.
3. We are reading the file and assigning it to the variable sources_data.
4. We are printing the variable sources_data.