Unix shell是unix的命令解释程序，用于让用户以一种友好的方式运行程序和执行命令。

本课程设计要求学生在linux下写一个命令解释程序，实现Ksh最基本的功能。即：允许用

户打入一个可执行的程序的名字以及其命令行参数，执行这个程序。同时实现一部分内部命

令（比如cd，详见要实现的命令），以及输入输出重定向等功能。-Unix shell is unix order to explain procedures to enable users to a friendly manner operational procedures and the enforcement of the order. The courses require students to design the linux under orders to write an interpretation of procedures, Ksh most basic functions. : Allows users to enter an executable program and the name of its command line parameters, the implementation of this procedure. Simultaneously part of the internal commands (such as cd, details to be achieved in order), and redirect input and output functions.