此外，您可以为单个命令临时地修改一个环境变量的值。
Additionally, you can temporarily alter the value of an environment variable for a single command.
配置项可以是环境变量或者数据库配置修改，例如数据库的内存分配。
A configuration item may be an environment variable or a change in the database configuration, such as its memory allocation.
在运行这个脚本之前，或者应当设置Derby _ INSTALL环境变量，或者修改脚本，以便Derby _ INSTALL指向安装Derby数据库的目录。
Before running this script, you should either set the DERBY_INSTALL environment variable or modify the script so that DERBY_INSTALL points to the directory in which you installed the Derby database.
第一步就是修改 JBOSS_HOME环境变量的值。
The first step is simply to modify the value of the JBOSS_HOME environment variable.
XML Publication工具箱的安装十分简单，仅仅涉及修改CLASSPATH环境变量。
The toolkit installation is quite simple, just involving modifying the CLASSPATH environment variable. Your CLASSPATH should be modified to include the following items.
有一些情形下，程序经过了修改，以使得难以利用它们来使用环境变量。
In some cases, programs have been modified to make it harder to exploit them using environment variables.
历史上，很多攻击利用的是命令shell处理IFS环境变量的方法，但是当今大部分的shell(包括GNUbash)已经经过了修改，从而使IFS难以利用。
Historically, many attacks exploited the way the command shell handled the IFS environment variable, but most of today's shells (including GNU bash) have been modified to make IFS harder to exploit.
编译器将会在预定义的位置集查找该头文件，这些预定义的位置可以通过设置查找路径环境变量或者通过命令行选项来修改。
The compiler will look for it in a predefined set of locations, which can be modified by setting a search path environment variable or through a command line option.
编译器将会在预定义的位置集查找该头文件，这些预定义的位置可以通过设置查找路径环境变量或者通过命令行选项来修改。
The compiler will look for it in a predefined set of locations, which can be modified by setting a search path environment variable or through a command line option.
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