simple shell meaning in English

单层壳体

All available programs are presented by a simple shell that makes it possible to start the program easily
程序的外观是一个简单的shell如图1 ,您可以轻松启动程序
First , he created simple shell script designed to write data to a test filesystem as quickly as possible
首先，他创建了一个简单的shell脚本，该脚本设计用来将数据尽快写入测试文件系统：
You can use the following simple shell script to test the md5crypt java program against the local linux registry
您可以使用下面这个简单的shell脚本来测试md5crypt java程序在本地linux注册系统上工作的情况。