How To invokeCode Model's Tool Kit in Xspixe

Hi, I want to learn using XSpice and for this I have installed Ngspice 22 in Linux machine. I want to create new code models in XSpice and link them with simulator. Code Model's Tool kit in XSpice offers commands like mkmoddir, mksimdir, etc for this purpose. While installing NgSpice, i have specified the option of enabling XSpice; but still it dosnt allow me to use these code model specific command, It gives error as "command not found". I have followed the steps mentioned in ngspice manual (attached with the post) for enabling XSpice while installation.
I already read the updated version of ngspice but in that they included only one figure so I dint got how to invoke code models. Is there anything else that i have to do? Please guide me on this.