Dual boot two Linux distros
I'd like to run Ubunto 16 and Kali on my machine. I've already installed Ubuntu on the 750GB hard drive with an encrypted home folder. I tried running Kali in Virtualbox and that is a disaster and unusable. I tried to run the Kali installation to have it dual boot with Ubuntu but at the partitioning section I'm stuck. I tried to boot into Ubuntu and use gparted to create some free space by halfing the drive but I am unable to resize anything. I'm also a noob at Linux so maybe I just don't know what I'm doing in gparted. The laptop is an older Core2Duo with 4GB RAM and a 750GB hard drive. I've run both Kali and Ubuntu on it so I know they both work.