I know that there are several questions regarding this already on this forum, but each one mostly addresses a specific question.
So I have a separate filesystem partition for /home and a separate filesystem partition for /.
I currently have ubuntu 16.04.
I want ubuntu 20.04. Among the various things in this forum, I have two options, either I take a backup and clear all ubuntu partitions and install ubuntu 20.04, and another option is that I ubdate 16.04 to 18.04 to 20.04. Which among these are beneficial and why? Also, I do not want to rely on the back up that I have taken.
Is it possible that I create another partition and for "/" in Ubuntu 20.04, and use /home partition from ubuntu 16.04? Will this be a good option?
To create a new partition will I have to defragment current partition and then create free space?
I want the most secure option among all above. I do not want to loose any data from "/home"
PS: I can see a grub option in possible keywords, I am not sure of what changes are required in grub.