Just installed kali linux being new to this linux world after installing i followed this article from fossmint about the first 10things to do after installing kali linux but on the 8th step while installing the katoolin applicaiton i got some error so i searched for the article which showed step by step installation of katoolin i ended up on this article it says we should have some programs which is python python3 which are there in my kali linux but it also needed a universe repository , so i searched for the command to install universe repository to kali linux
sudo add-apt-repository universe
after running this command it showed me this error
Unable to handle repository shortcut 'universe'
How do i fix this ? my system OS: Kali Linux (recently installed)
Edit: Thank you for your help as a newbie in the Linux world. I was advised on what to do and what not to do in Kali Linux. I learned that the universe and multiverse repositories are not available for Debian-based OS and that Kali Linux is not recommended for beginners. Going forward, I will only follow Kali Official documentation and avoid relying on random articles if I continue to use Kali Linux.