I installed Debian 9 today, configured it and decided to get some pentesting tools. I found this thing called katoolin.
What it did was added Kali's repos to my sources.list. And then I forgot that I added them. And I ran
apt-get update && apt-get upgrade && apt-get dist-upgrade... And it went for 10 min, grabbed over 600 items from Kali's repo, and stopped. But when I restarted the machine I saw that suddenly the grub background is Kali, and the name of the machine in GRUB is Kali.
The system works, I can do programming and so on, it doesn't bother me personally. But for safety and everything should I reinstall Debian/roll back the
apt-get (if it's doable)?