On Sun, Oct 04, 2015 at 07:39:58PM +0530, Himanshu Shekhar wrote: > How can I disable further usage of backports without harming other packages?
You don't really need to do that. All backports are deactivated by default and you need to do apt-get -t jessie-backports install whatever to install them. So, contrary to what happens with other sources.list lines, adding the backports line will not make "apt-get upgrade" to suddenly "contaminate" your system with lots of new versions of already installed packages.
