Shell viruses wrap themselves around a host program and don't modify the original program．Shell programs are easy to write，which is why about half of viruses are of this type．

外壳型病毒将它们自己包裹在主程序的四周，对源程序不作修改。 外壳型病毒容易编写，这也正是约有一半病毒程序是这种类型的原因。

OpenSSH (OpenBSD Secure Shell) is a set of computer programs providing encrypted communication sessions over a computer network using the SSH protocol.

OpenSSH (OpenBSD Secure Shell) 是一组计算机程序，使用 SSH 协议通过网络提供加密通信会话。

While color might be convenient for sighted people who can distinguish them, they are not much use to others, and certainly not much use to shell scripts or programs.

虽然颜色可能对能区分它们的视力正常人群很方便，但对其他人用处不大，当然对shell脚本或程序也用处不大。

One thing that's very noticeable is that the TiVo has a fairly loose combination of shell scripts, Tcl programs, and binaries.

非常值得注意的一件事情是 TiVo 具有一个非常松散的 shell 脚本、Tcl 程序和二进制程序的组合。

As the name implies, startup scripts are true shell scripts-those little programs you write to achieve some work.

顾名思义，启动脚本是真正的shell脚本，即为实现某些工作而编写的小程序。

Metacharacters: Metacharacters are characters that have special meanings to programs or libraries you depend on, such as the command shell or SQL.

元字符：元字符是在您所依赖的程序或库中——比如命令shell或者SQL——有特定含义的字符。

Learn to use the powerful features of the shell at the command line, in scripts, and in interaction with your own programs.

学习在命令行、在脚本中以及在与您自己的程序的交互中使用shell的强大功能。

The standard shell is a full programming language with many built-in capabilities designed to make it easy to integrate other programs.

标准shell是一种完备的编程语言，具有很多内置的功能，用于简化与其他程序的集成。

This means that environment variables not only are exclusive to shell scripts, but can be used by standard compiled programs as well.

环境变量不仅由shell脚本独用，而且还可以由编译过的标准程序使用。

The bash shell contains two types of commands: builtins, which are internal, and external programs (or external filters and commands), which are typically self-contained binary program files.

bash shell包含两类命令：内部的内置命令和外部程序(或外部筛选器和命令，它们通常是自含的二进制程序文件)。

Each device family has a shell program — Extras on Crystal, and the Launcher on Quartz — that allows the user to run application programs.

每种设备系列都有一个shell程序—Crystal上的Extras和Quartz上的Launcher，它们允许用户运行应用程序。

Typically, shell scripts and UNIX programs return 0 on successful completion.

在通常情况下，shell脚本和UNIX程序在成功完成时返回零。

At the AIX shell prompt, it takes three commands to compile the programs, one command to generate an executable main program and run it.

在AIX shell提示中，它使用三个命令编译程序，一个命令生成一个可执行主程序并运行该程序。

For instance, if you can't access a particular file from your command-line shell, programs you launch from the shell inherit the same limitation.

例如，如果您无法在命令行Shell中访问某个特定文件，则您从Shell中启动的程序也会继承同样的限制。

The user then has a standard command set of programs available to him or her from within your bash shell environment $PATH variable.

在此之后，用户就可以使用 bash shell 环境变量 $PATH 中指定的标准命令集。

For example, it includes a shell (the program that provides a command prompt and lets you run programs), a program to copy files, a program to delete files, and many other odds and ends.

例如，操作系统包含 shell(shell 程序提供命令提示符并且可以让你运行命令)、拷贝文件的程序、删除文件的程序还有其它这类东西。

Running one of the freely available Terminal programs found in the Android Market allows you to run a shell session on the Android phone itself.

运行Android Market免费提供的Terminal程序将允许您在Android手机中运行一个shell会话。

The figures of average field-synergy angles in the shell side are obtained using user-defined programs.

编制自定义程序提取了壳侧平均场协同角的直观图。

Python is simple to use, but it is a real programming language, offering much more structure and support for large programs than the shell has.

Python很容易上手，但它是一门真正的编程语言，相对于Shell，它提供的针对大型程序的支持和结构要多的多。

Python is simple to use, but it is a real programming language, offering much more structure and support for large programs than shell scripts or batch files can offer.

虽然python易于使用，但它却是一门完整的编程语言；与Shell脚本或批处理文件相比，它为编写大型程序提供了更多的结构和支持。