I am trying to resize an existing Linux Mint main partition by shrinking it down to 100 GiB so I can dual boot another OS.
I tried booting into a live session of GPARTED from a usb and while I can shrink the existing partition, when I try to create a partition in the unallocated space, I can only make a logical partition. The other two options, namely: primary and extended are greyed out. I have read that you only install an OS in a primary partition:
Should I redo the base mint installation all over again? Or is there anything that can be done from this point onwards?