we need to add different repository on software sourcelist .we need to add a authentication keys for the repositories.for that we need to add this below script on /bin/ folder.
#! /bin/sh if [ "`whoami`" != "root" ]; then echo “Please run with SUDO” exit 1 fi RELEASE=`cat /etc/lsb-release | grep DISTRIB_CODENAME | cut -d”=” [...]