This is achieved by checking whether the corresponding variable has been set and adding the option to the command line.
这是通过检查对应的变量是否已设置并将该选项添加到命令行来实现的。
The short form string should include each valid option letter, followed by a colon (:) to indicate that the command line option should be followed by a value.
短形式字符串应该包含每个有效的选项字母，每个字母后面是一个冒号 (:)，这表示命令行选项后面应该是一个值。
A reference topic provides specific information, such as a command, message, program option, or API.
参考主题提供了特定的信息，如命令、消息、程序选项或者API。
Go to the console TAB and select the command prompt option.
转到控制台选项卡并选择命令提示选项。
The number of lines skipped after each breakpoint can be modified using the SKIP option in the BREAK command.
每个断点后跳过的行的数量可以使用BREAK命令的SKIP选项进行修改。
Another option is to run it from the command line.
另一个选择是从命令行运行。
The remote database is defined via the database option within the LOAD command.
在LOAD命令中通过DATABASE选项定义远程数据库。
To do this, you have the option of issuing a command in command CLP or in a guided GUI wizard.
可以在命令CLP中使用命令或在GUI向导中进行这个设置。
You enable the JNI check option with the following command line.
您可以通过以下命令行启用JNI检测选项。
To install to a different file system, specify the — prefix option on the RPM command. For example.
要将它安装到不同的文件系统中，需要在rpm命令中指定——prefix选项。
If the database is suspect, you must use the NO_TRUNCATE option for the BACKUP command.
如果数据库是置疑的，你必须使用带NO _ TRUNCATE选项的BACKUP命令。
Listing 5. Information returned by the "info" option on the db2trc command.
清单5.db 2 trc命令的“info ”选项所返回的信息。
Specifying the X option runs ProbeVue for the duration of the command specified with the X option.
指定—x选项，这会在指定的命令执行期间运行ProbeVue。
Finally, to associate all the input parameters with the same command option, you add the command-line option to the positional_options_description object with value -1. Here's the code.
最后，若要将所有的输入参数与同一个命令行选项相关联，您需要使用值- 1将该命令行选项添加到positional_options_description对象。
We'll use a password file command-line option in the script.
我们将在脚本中使用一个密码文件命令行选项。
Command-line processing typically requires both a short and a long name for the same command option.
命令行处理通常同时需要同一个命令选项的短名称和长名称。
The -H option dereferences links on the command line and the -L option dereferences those plus links that are part of the display.
H选项取消引用命令行上的链接，而-L 选项取消引用属于显示内容一部分的附加链接。
The -verbose: gc command-line option produces trace data containing gc statistics including the heap occupancy.
gc命令行选项生成包含gc统计数据(包括堆占用情况)的跟踪数据。
To get the information in 1k blocks, use the -k command-line option, as shown in Listing 2.
要获得以1k块为单位的信息，可以使用- k命令行选项，如清单2所示。
For example, in the code above we used -d "for the command line option defining a name-value pair."
比方说，在上面的代码中我们用“- D”这一命令行选项来定义名-值对。
Use the -M command line option to set the maximum size of the cache.
使用-M命令行选项来设置高速缓存的最大大小。
To extend the search for input files to include subdirectories, add the -recurse option to the command.
如果要将输入文件的搜索扩展为包含子目录，可向命令中添加-recurse选项。
The -p option displays each fabricated command and prompts you for authorization.
p选项显示每个合成的命令，并提示您进行确认。
The tail command has another handy option, -f (follow).
tail命令还有一个有用的选项-f (follow)。
The -t option echoes each command to stderr before each command is executed.
t选项可以在执行每个命令之前将命令回显到stderr。
You can also number lines with the -n option of the cat command.
也可以使用cat命令的-n选项对行进行编号。
This example shows the importance of the -m option in the db2look command.
该示例显示了db2look命令中- m选项的重要性。
When used with the -root option, the XWD command is non-interactive because you are capturing everything.
在使用-root选项时，xwd命令不是交互式的，因为要捕获屏幕上的所有东西。
If something was wrong, it returns an error code that is documented under the verify option for the command-line tool.
如果有地方出了问题，则返回一个错误代码，该代码被记录在命令行工具的verify选项下。
The -q option in the command for the COBOL programs passes the THREAD compiler option to compiler.
用于COBOL程序的命令中的- q选项将THREAD编译器选项传递给编译器。
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