Question

What is the purpose of the command interpreter? why is it usually separate from the kernel?

Answer 1

Thanks for asking this question .
The command interpreter takes the command from user as well as from the file in order to execute them well. This is done by turning them into usually one or more than one system calls. command interpreter is usually kept  separate from the kernel because the interpreter is generally to bring changes.So having the kernel with command interpreter may bring some problems .
Hope this will help you.