posted 10 years ago
You can have as many different distros and versions of Linux on your machine as you can spare partitions for. If you want, you can tell the Red Hat installer to wipe out the Kali partition and re-use it for Red Hat OR you can install Red Hat into a partition of its own.
Actually, it goes further than that, since although the /boot directory needs to be in a distinct partition, the actual Linux kernels and installations can be in LVM Logical Volumes. With a little care, the same /boot can be used with more than one copy of Linux.
Education won't help those who are proudly and willfully ignorant. They'll literally rather die before changing.