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Запускает отдельное окно командной строки для запуска указанной программы или команды. Starts a separate Command Prompt window to run a specified program or command.

Синтаксис Syntax

Параметры Parameters

Параметр Parameter	Описание Description
Задает заголовок, отображаемый в строке заголовка окна командной строки . Specifies the title to display in the Command Prompt window title bar.
/d

Указывает каталог запуска. Specifies the startup directory. /i /i Передает Cmd.exe среду запуска в новое окно командной строки . Passes the Cmd.exe startup environment to the new Command Prompt window. Если параметр /i не указан, используется текущая среда. If /i is not specified, the current environment is used. Служит для сворачивания (/min) или развертывания (/Макс) нового окна командной строки . Specifies to minimize (/min) or maximize (/max) the new Command Prompt window. Запускает 16-разрядные программы в отдельном пространстве памяти (/сепарате) или общей памяти (/Shared). Starts 16-bit programs in a separate memory space (/separate) or shared memory space (/shared). Эти параметры не поддерживаются на 64-разрядных платформах. These options are not supported on 64-bit platforms. Запускает приложение в указанном классе приоритета. Starts an application in the specified priority class. /аффинити /affinity Применяет указанную маску схожести процессоров (выраженную в виде шестнадцатеричного числа) к новому приложению. Applies the specified processor affinity mask (expressed as a hexadecimal number) to the new application. /Wait /wait Запускает приложение и ждет его завершения. Starts an application and waits for it to end. /елевате /elevate Запускает приложение от имени администратора. Runs application as administrator. /b /b Запускает приложение, не открывая новое окно командной строки . Starts an application without opening a new Command Prompt window. Обработка CTRL + C игнорируется, если приложение не поддерживает обработку CTRL + C. CTRL+C handling is ignored unless the application enables CTRL+C processing. Чтобы прервать работу приложения, используйте сочетание клавиш CTRL + BREAK. Use CTRL+BREAK to interrupt the application. [ [

. ]] Указывает запускаемую команду или программу. Specifies the command or program to start.

Указывает параметры для передачи в команду или программу. Specifies parameters to pass to either the command or the program. /? /? Отображение справки в командной строке. Displays help at the command prompt.

Комментарии Remarks

Вы можете запускать неисполняемые файлы с помощью сопоставления файлов, вводя имя файла в виде команды. You can run non-executable files through their file association by typing the name of the file as a command.

При выполнении команды, содержащей строку CMD в качестве первого маркера без квалификатора расширения или пути, команда CMD заменяется значением переменной COMSPEC. If you run a command that contains the string CMD as the first token without an extension or path qualifier, CMD is replaced with the value of the COMSPEC variable. Это не позволяет пользователям выбирать cmd из текущего каталога. This prevents users from picking up cmd from the current directory.

Если вы запускаете приложение с 32-битным графическим пользовательским интерфейсом (GUI), программа cmd не ждет завершения работы приложения, прежде чем вернуться в командную строку. If you run a 32-bit graphical user interface (GUI) application, cmd does not wait for the application to quit before returning to the command prompt. Такое поведение не происходит при запуске приложения из командного скрипта. This behavior does not occur if you run the application from a command script.

При выполнении команды, использующей первый токен, который не содержит расширение, Cmd.exe использует значение переменной среды ПАСЕКСТ, чтобы определить, какие расширения следует искать и в каком порядке. If you run a command that uses a first token that does not contain an extension, Cmd.exe uses the value of the PATHEXT environment variable to determine which extensions to look for and in what order. Значение по умолчанию для переменной ПАСЕКСТ: The default value for the PATHEXT variable is:

Обратите внимание, что синтаксис аналогичен переменной PATH с точкой с запятой (;) Отделение каждого расширения. Note that the syntax is the same as the PATH variable, with semicolons (;) separating each extension.

При поиске исполняемого файла, если нет совпадения с каким-либо расширением, запустите проверку, чтобы проверить, совпадает ли имя с именем каталога. When searching for an executable file, if there is no match on any extension, start checks to see if the name matches a directory name. Если это так, то Start открывает Explorer.exe по этому пути. If it does, start opens Explorer.exe on that path.

Примеры Examples

Чтобы запустить программу MyApp из командной строки и использовать текущее окно командной строки , введите: To start the Myapp program at the command prompt and retain use of the current Command Prompt window, type:

Чтобы просмотреть раздел справки по командной строке в отдельном окне командной строки с развернутым окном, введите: To view the start command-line help topic in a separate maximized Command Prompt window, type:

Use the at command to schedule tasks

This article describes how to use the at command to create and to cancel scheduled tasks.

Original product version: В Windows 2000
Original KB number: В 313565

This article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010. For more information, see the Microsoft Support Lifecycle Policy.

Summary

In Windows 2000, you can use the Task Scheduler tool in Control Panel to schedule tasks. You can also use the at command to schedule tasks manually.

Overview of the at command

You can use the at command to schedule a command, a script, or a program to run at a specified date and time. You can also use this command to view existing scheduled tasks.

To use the at command, the Task Scheduler service must be running, and you must be logged on as a member of the local Administrators group. When you use the at command to create tasks, you must configure the tasks so that they run in the same user account.

The at command uses the following syntax:

at \\computername time/interactive | /every: date, . /next: date, . command

at \\computername id/delete | /delete /yes

The following list describes the parameters that you can use with the at command:

\computername: Use this parameter to specify a remote computer. If you omit this parameter, tasks are scheduled to run on the local computer.

time: Use this parameter to specify the time when the task is to run. Time is specified as hours: minutes based on the 24-hour clock. For example, 0:00 represents midnight and 20:30 represents 8:30 P.M.

/interactive: Use this parameter to allow the task to interact with the desktop of the user who is logged on at the time the task runs.

/every: date. : Use this parameter to schedule the task to run on the specified day or days of the week or month, for example, every Friday or the eighth day of every month. Specify date as one or more days of the week (use the following abbreviations: M,T,W,Th,F,S,Su) or one or more days of the month (use the numbers 1 through 31). Make sure that you use commas to separate multiple date entries. If you omit this parameter, the task is scheduled to run on the current day.

/next: date, . Use this parameter to schedule the task to run on the next occurrence of the day (for example, next Monday). Specify date as one or more days of the week (use the following abbreviations: M,T,W,Th,F,S,Su) or one or more days of the month (use the numbers 1 through 31). Make sure that you use commas to separate multiple date entries. If you omit this parameter, the task is scheduled to run on the current day.

command: Use this parameter to specify the Windows 2000 command, the program (.exe or .com file), or the batch program (.bat or .cmd file) that you want to run. If the command requires a path as an argument, use the absolute path name (the entire path beginning with the drive letter). If the command is on a remote computer, use the Uniform Naming Convention (UNC) path name (\ServerName\ ShareName). If the command is not an executable (.exe) file, you must precede the command with cmd /c , for example, cmd /c copy C:\*.* C:\temp .

id: Use this parameter to specify the identification number that is assigned to a scheduled task.

/delete: Use this parameter to cancel a scheduled task. If you omit the id parameter, all scheduled tasks on the computer are canceled.

/yes: Use this parameter to force a yes answer to all queries from the system when you cancel scheduled tasks. If you omit this parameter, you are prompted to confirm the cancellation of a task.

When you use the at command, the scheduled task is run by using the credentials of the system account.

Create a scheduled task

Click Start, point to Programs, point to Accessories, and then click Command Prompt.

At the command prompt, type the net start command, and then press ENTER to display a list of currently running services:

If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:

At the command prompt, type the following line (use the parameters that are appropriate to your situation), and then press ENTER:

Examples

To copy all files from the Documents folder to the MyDocs folder at midnight, type the following line, and then press ENTER:

To back up the Products server at 11:00 P.M. each weekday, create a batch file that contains the backup commands (for example, Backup.bat), type the following line, and then press ENTER to schedule the backup:

To schedule a net share command to run on the Sales server at 6:00 A.M. and to redirect the listing to the Sales.txt file in the shared Reports folder on the Corp server, type the following line, and then press ENTER:

Cancel a scheduled task

Click Start, point to Programs, point to Accessories, and then click Command Prompt.

At the command prompt, type the net start command, and then press ENTER to display a list of currently running services.

If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:

At the command prompt, type the following line (use the parameters that are appropriate to your situation), and then press ENTER:

Examples to cancel scheduled tasks

• To cancel all tasks that are scheduled on the local computer, type at /delete , and then press ENTER.
• To cancel the task ID 8 on a computer that is named MyServer, type at \\MyServer 8 /delete , and then press ENTER.

View scheduled tasks

To view the tasks that you created by using the at command, follow these steps:

Click Start, point to Programs, point to Accessories, and then click Command Prompt.

At the command prompt, type the net start command, and then press ENTER to display a list of currently running services.

If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:

At the command prompt, do one of the following steps:

• To view a list of tasks that you scheduled by using the at command, type the at \\computername line, and then press ENTER.
• To view a specific scheduled task, type the at \\computername id command, and then press ENTER.

Examples to view scheduled tasks

• To view all scheduled tasks on the local computer, type at , and then press ENTER.
• To view all scheduled tasks on a computer named Support, type at \\support , and then press ENTER.
• To view the task ID 18 on the local computer, type at 18 , and then press ENTER.

Troubleshooting

When you type at \\computername to view a list of scheduled tasks, some (or all) of the scheduled tasks that you created by using the at command are not listed.

This behavior can occur if you modified the tasks in the Scheduled Tasks folder after you used the at command to create the task. When you use the at command to schedule a task, the task is displayed in the Scheduled Tasks folder in Control Panel. You can view or modify the task. However, if you modify the task, when you use the at command, you cannot view the task.

When you use the at command to schedule a task, the task does not run at the specified time or date.

This behavior can occur if one of the following conditions is true:

The command syntax is incorrect.

After you schedule a task, type at \\computername to confirm that the syntax is correct. If the information that is displayed under Command Line is incorrect, cancel the task, and then recreate it.

You schedule a task to run a command that is not a .exe file.

The at command does not automatically load cmd (the command interpreter) before it runs commands. Unless you are running a .exe file, you must load Cmd.exe at the beginning of the command, for example, at cmd /c dir > c:\test.txt .

References

For more information about how to use the at command in Windows 2000, see Windows 2000 Help. To do so, click Start, click Help, click the Index tab, and then type at command.