I followed this tutorial http://kemitix.postach.io/install-viber-on-debian-wheezy to install viber on debian wheezy 7.6. My problem is about the part that says:Fix the default version to wheezy. Add this line to  /etc/apt/apt.conf.d/10release: APT::Default-Release wheezy;i went to /etc/apt/apt.conf.d/ but there wasn't a 10release file, so i created it and i add the line. After this i did an update and i install libc6 from the testing repository. I saw from the installation log of libc6 that a lot of system libs,etc were changed.So why the 10release file didn't exist? do i need to add theAPT::Default-Release wheezy; line somewhere else too?What exactly happed by installing this lib from testing repository?Will i get updates from the testing repo? Did the testing entry tothe sources.list changed my debian version?How can i ensure that my default version is wheezy and i won't getupdates from testing repo?
Fix the debian default version to wheezy
linux;apt;debian