Hi Everyone! this is an updated post on Kali Linux repositories. Well, a repository is an archival source from where Kali Linux softwares are updated and upgraded online. sources.list is the file where all the links for necessary update are saved. When we execute a command apt-get update , it searches for the updated package online. Un-wanted or un-necessary links can cause failure of Kali Linux package installation, so make sure what link/s should be added to the repository so that Kali Linux should get proper update. Kali Linux distribution has three repositories, which are mirrored world-wide: http.kali.org ( mirrorlist ): the main package repository ; security.kali.org ( mirrorlist ): the security package repository ; cdimage.kali.org ( mirrorlist ): the repository with ISO images . On a clean installation, Kali Linux, have the following two entries present in /etc/apt/sources.list : deb http://http.kali.org/kali kali main non-free contrib deb http://se...