I have created a bootable thumbdrive with kali. I've also created a partition for persistence and can log in normally but when I try to use commands such as "fdisk -l" it says: "command not found" message in the console. I tried doing "which fdisk" and "uso which fdisk" and took me to /usr/sbin/fdsisk but still can't use it to install the persistence kali like the tutorials i've been watching, do you have any ideas why they doesn't work?