The first thing one typically does in a new Linux installation is to edit a few text files, such as /etc/fstab or /etc/hosts , in some terminal window. This is unfortunately the first bad experience with Ubuntu / Kubuntu: They broke vi in the root account! Namely, after launching vi , you can't...
Source: [Dev.to](https://dev.to/bhaible/ubuntu-kubuntu-2604-customizing-the-root-account-428k)