外部命令就是指文件系统中的文件。
没有特定的函数或语法用于调用外部命令。
There is no special function or syntax for calling an external command. Taking advantage of the Regina utility rxqueue, which puts output onto the Rexx stack, we can write a "numbered ls" utility as
创建一个新的nagcm d组以便外部命令可以通过web界面提交。
Create a new nagcmd group to allow external commands to be submitted through the Web interface.
Perl脚本使用两个外部命令：xsltproc和wget。
The Perl script uses two external commands: xsltproc and wget.
让我们探讨一下外部命令以及如何运行它们，以及如何判断某个命令是否是内部的。
Let's now look at external commands and how to run them, and how to tell if a command is internal.
正如你们已经了解到的，全部DOS命令可归类为内部命令，或外部命令。
As you have known, all DOS commands are classified as either internal or external.
安装二进制文件、init脚本、示例配置文件并设置外部命令目录上的权限，如清单6所示。
Install binaries, init script, sample config files, and set permissions on the external command directory, as shown in Listing 6.
“生成错误”窗格中，而基本上每个外部命令工具都转到其自己的唯一输出窗口窗格中。
Build Errors pane, while each external command tool potentially goes to its own distinct output window pane.
type命令还显示出，cd是一个内置的命令，并且与外部命令 /usr/bin/cd 是相同的。
The type command also shows that cd is a built-in command and is duplicated externally as /usr/bin/cd.
php为执行外部命令提供大量函数，其中包括shell_exec 、exec 、passthru和system 。
PHP provides a number of functions for executing external commands, among them shell_exec , exec , passthru , and system .
任意接下来的外部命令，如果他们是在默认的SYSTEM环境下运行，将把它们的输入定向到默认的FIFO(先入先出，first - in - first - out)。
Any subsequent external commands, if they are run in the default SYSTEM environment, will direct their output to the default FIFO. (first-in-first-out).
周二晚的这次惨败的关键在于Selerity的自动计算机程序bots； bots是一种能执行外部命令的自动运行型木马，可以扫描网页搜寻有利可图的秘密信息。
The key factor in Tuesday evening's fiasco was that Selerity's automatic computer programs, called bots, which scan the web for juicy financial details, were able to find the mistake so quickly.
周二晚的这次惨败的关键在于Selerity的自动计算机程序bots； bots是一种能执行外部命令的自动运行型木马，可以扫描网页搜寻有利可图的秘密信息。
The key factor in Tuesday evening's fiasco was that Selerity's automatic computer programs, called bots, which scan the web for juicy financial details, were able to find the mistake so quickly.
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