To start setoolkit type setoolkit or find it in the list of apps by typing set.You can only run setoolkit when you are a root user therefore any time you are using setoolkit you must be a root user by running sudo su if you are not a root user you will see the message below How to install setoolkit (set) in kali linux nethunter Setoolkit is a tool for pent testing ,in setoolkit many packages are install which are meant for hacking and so many other things. When you install setoolkit you are responsible for the risk thereof. Disclaimer : is not responsible for the usage outcome when you install setoolkit, the installation of setoolkit here is for educational purpose only.