Better fix that "FrankenDebian" first. Please read and understand this useful article: https://wiki.debian.org/DontBreakDebian
On 02.10.2017 15:53, Victor Porton wrote: > $ cat /etc/apt/sources.list > deb http://httpredir.debian.org/debian/ stretch main contrib non-free > deb http://httpredir.debian.org/debian/ stretch-backports main contrib > non-free > deb http://httpredir.debian.org/debian/ buster main contrib non-free > deb http://httpredir.debian.org/debian/ sid main contrib non-free > deb http://httpredir.debian.org/debian/ stretch-updates main contrib non-free > deb http://security.debian.org/ stretch/updates main contrib non-free > > deb-src http://httpredir.debian.org/debian/ stretch main contrib non-free > deb-src http://httpredir.debian.org/debian/ stretch-backports main contrib > non-free > deb-src http://httpredir.debian.org/debian/ buster main contrib non-free > deb-src http://httpredir.debian.org/debian/ sid main contrib non-free > deb-src http://httpredir.debian.org/debian/ stretch-updates main contrib > non-free > deb-src http://security.debian.org/ stretch/updates main contrib non-free > > $ sudo apt -t=stretch-backports install kate >
