How To Use the AT Command to Schedule Tasks

[patris1]

http://support.microsoft.com/?scid=kb%3Ben-us%3B313565&x=14&y=12

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



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.

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



How to Create a Scheduled Task

1. Click Start, point to Programs, point to Accessories, and then click Command Prompt.
2. At the command prompt, type the following line, and then press ENTER to display a list of currently running services: net start
   If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:net start "task scheduler"
3. At the command prompt, type the following line (use the parameters that are appropriate to your situation), and then press ENTER:at \\computername time /interactive | /every:date,... /next:date,... command

Examples

• To copy all files from the Documents folder to the MyDocs folder at midnight, type the following line, and then press ENTER:at 00:00 cmd /c copy C:\Documents\*.* C:\MyDocs
• 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: at \\products 23:00 /every:M,T,W,Th,F 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:at \\sales 06:00 cmd /c "net share reports=d:\Documents\reports >> \\corp\reports\sales.txt"

How to Cancel a Scheduled Task

1. Click Start, point to Programs, point to Accessories, and then click Command Prompt.
2. At the command prompt, type the following line, and then press ENTER to display a list of currently running services: net start
   If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:net start "task scheduler"
3. At the command prompt, type the following line (use the parameters that are appropriate to your situation), and then press ENTER:at \\computername id /delete | /delete/yes

Examples

• 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.

How to View Scheduled Tasks

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

1. Click Start, point to Programs, point to Accessories, and then click Command Prompt.
2. At the command prompt, type the following line, and then press ENTER to display a list of currently running services: net start
   If Task Scheduler is not displayed in the list, type the following line, and then press ENTER:net start "task scheduler"
3. 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 following line, and then press ENTER:at \\computername
     -or-
   • To view a specific scheduled task, type the following line, and then press ENTER:at \\computername id

Examples

• 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.
  
  To work around this behavior, view or modify the task in the Scheduled Tasks folder in Control Panel.For additional information about this behavior, click the article number below to view the article in the Microsoft Knowledge Base: 220149 (AT Tasks Cannot Be Viewed Using the Task Scheduler Tool ) AT Tasks Cannot Be Viewed Using the Task Scheduler Tool
• 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 are 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.
    
    -or-
  • You schedule a task to run a command that is not an .exe file.
    
    The at command does not automatically load cmd (the command interpreter) before it runs commands. Unless you are running an .exe file, you must load Cmd.exe at the beginning of the command, for example, at cmd /c dir > c:\test.txt.

For additional information about troubleshooting the AT command, click the article numbers below to view the articles in the Microsoft Knowledge Base: 142040 (Troubleshooting AT Command Using /k Switch ) Troubleshooting AT Command Using /k Switch
121562 (Applications Started with AT Are Not Interactive ) Applications Started with AT Are Not Interactive









For additional 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.

For additional information about working with the AT command in Windows 2000, click the article number below to view the article in the Microsoft Knowledge Base: 103650 (Network Connections Made with the AT Command are Persistent ) Network Connections Made with the AT Command Are Persistent



APPLIES TO

• Microsoft Windows 2000 Server
• Microsoft Windows 2000 Advanced Server
• Microsoft Windows 2000 Professional Edition
• Microsoft Small Business Server 2000 Standard Edition

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موضوعات مشابه:

• مشکل در عدم وجود قسمت additional tasks در SDM
• مشکل با BandwidthSplitter Schedule
• SolutionBase: Performing common tasks in Exchange Server 2007
• Windows Server 2008 Initial Configuration Tasks
• Schedule در روتر

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[patris1]

http://support.microsoft.com/kb/103650/EN-US/

Network connections made using the AT command are persistent for all users on a system. The AT command runs using the System account and Schedule service. Creating network connections under the System account makes the connections persistent for all users who log on and log off the computer. However, this type of connection is not saved as a normal persistent connection. If the computer is rebooted, the connection is no longer present.

Network connections made using the AT command can be removed using the System account or by an Administrator. This type of network connection is similar to the Common Program Groups an Administrator can create in Program Manager.



Steps to Reproduce Behavior

1. In the Control Panel window, choose Services and start the Schedule service if it is not already started.
2. Create a batch file named Atnetuse.bat containing the following command line:
   NET USE W: \\servername\sharename
3. Use the AT command to run ATNETUSE in 5 minutes. For example:
   AT 12:00 ATNETUSE.BAT
4. After ATNETUSE is run by the AT command, the persistent drive W will available in a Command Prompt and in File Manager.
5. Drive W is represented by a network drive button in File Manager, but the share name \\servername\sharename does not appear after W: in the drive drop down dialog box. The NET USE command from a Command Prompt (Cmd.exe) will not show drive W or \\servername\sharename, but you can use drive W as a normal network drive. Also, drive W is now a drive for all Users. No matter who logs in, everyone will get the drive W even though it is not in any user's persistent connections.

A user without Administrator privileges logged in with this type of persistent connection present cannot remove the connection unless the AT command is used.

Use one of the following methods to remove the connection:

• Use the AT command to schedule disconnecting the drive with a NET USE W: /D command.
• An administrator can use the NET USE W: /D command from a Command Prompt.
• Shut down and restart the computer.

APPLIES TO

• Microsoft Windows 2000 Server
• Microsoft Windows 2000 Advanced Server
• Microsoft Windows 2000 Professional Edition
• Microsoft Windows NT Advanced Server 3.1
• Microsoft Windows NT Workstation 3.1
• Microsoft Windows NT Workstation 3.51
• Microsoft Windows NT Workstation 4.0 Developer Edition
• Microsoft Windows NT Server 3.51
• Microsoft Windows NT Server 4.0 Standard Edition

[patris1]

http://support.microsoft.com/?scid=kb%3Ben-us%3B814596&x=14&y=6

In Windows Server 2003, you can use Scheduled Tasks in Control Panel to create, delete, configure, or display scheduled tasks. You can also use Schtasks.exe to schedule tasks manually.



Overview of the Schtasks.exe Tool

Schtasks schedules commands and programs to run periodically or at a specific time. Schtasks adds and removes tasks from the schedule, starts and stops tasks on demand, and displays and changes scheduled tasks.

Back to the top
Syntax and Parameters

The following is a list of the syntax and parameters that you can use with Schtasks.exe:

• Schtasks /Create
  
  Creates a new scheduled task.
  
  • Syntax:
    schtasks /create/tn TaskName /tr TaskRun /sc schedule [/mo modifier] [/d day] [/m month[,month...] [/i IdleTime] [/st StartTime] [/sd StartDate] [/ed EndDate] [/du duration] [/s computer [/u [domain\]user /p password]] [/ru {[Domain\]User | "System"} [/rp Password]] /?
  • Parameters:
    
    • /tn TaskName Specifies a name for the task.
    • /tr TaskRun Specifies the program or command that the task runs. Type the fully qualified path and file name of an executable file, script file, or batch file. If you omit the path, Schtasks.exe assumes that the file is in the Systemroot\System32 folder.
    • /sc schedule Specifies the schedule type. Valid values are MINUTE, HOURLY, DAILY, WEEKLY, MONTHLY, ONCE, ONSTART, ONLOGON, ONIDLE.
    • /mo modifier Specifies how frequently the task runs in its schedule type. This parameter is required for a MONTHLY schedule. This parameter is valid, but optional, for a MINUTE, HOURLY, DAILY, or WEEKLY schedule. The default value is 1.
    • /d day Specifies a day of the week or a day of a month. Valid only with a WEEKLY or MONTHLY schedule.
    • /m month[,month...] Specifies a month of the year. Valid values are JAN - DEC and * (every month). The /m parameter is valid only with a MONTHLY schedule. It is required when the LASTDAY modifier is used. Otherwise, it is optional and the default value is * (every month).
    • /i IdleTime Specifies how many minutes the computer is idle before the task starts. Type a whole number from 1 to 999. This parameter is valid only with an ONIDLE schedule, and then it is required.
    • /st StartTime Specifies the time of day that the task starts in HH:MM:SS 24-hour format. The default value is the current local time when the command completes. The /st parameter is valid with MINUTE, HOURLY, DAILY, WEEKLY, MONTHLY, and ONCE schedules. It is required with a ONCE schedule.
    • /sd StartDate Specifies the date that the task starts in MM/DD/YYYY format. The default value is the current date. The /sd parameter is valid with all schedules, and is required for a ONCE schedule.
    • /ed EndDate Specifies the last date that the task is scheduled to run. This parameter is optional. It is not valid in a ONCE, ONSTART, ONLOGON, or ONIDLE schedule. By default, schedules have no ending date.
    • /du Duration Specifies a maximum length of time for a minute or hourly schedule in the HHHH:MM 24-hour format. After the specified time elapses, Schtasks does not start the task again until the start time happens again. By default, task schedules have no maximum duration. This parameter is optional and valid only with a MINUTE or HOURLY schedule.
    • /s Computer Specifies the name or IP address of a remote computer, with or without backslash characters. The default is the local computer.
    • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who is logged on to the computer that is running Schtasks.
    • /p password Specifies the password of the user account that you specified in the /u parameter. This parameter is required when the /u parameter is used.
    • /ru {[Domain\]User | "System"} Runs the tasks with the permission of the specified user account. By default, the task runs with the permissions of the user who is logged on to the computer that is running Schtasks.
    • /rp Password Specifies the password of the user account that is specified in the /ru parameter. If you omit this parameter when you specify a user account, Schtasks.exe prompts you for the password and obscures the text you type. Tasks that run with permissions of the NT Authority\System account do not require a password and Schtasks.exe does not prompt for one.
    • /? Displays help at the command prompt.
    
    
  
  
• Schtasks /Change
  
  Changes one or more of the following properties of a task:
  
  • The program that the task runs (/tr ).
  • The user account under which the task runs (/ru ).
  • The password for the user account (/rp ).
  
  
  
  • Syntax:schtasks /change /tn TaskName [/s computer [/u [domain\]user /p password]] [/tr TaskRun] [/ru [Domain\]User | "System"] [/rp Password]
  • Parameters:
    
    • /tn TaskName Identifies the task to be changed. Type the task name.
    • /s Computer Specifies the name or IP address of a remote computer with or without backslash characters. The default is the local computer.
    • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who is logged on to the computer that is running Schtasks.
    • /p password Specifies the password of the user account that you specified in the /u parameter. This parameter is required when the /u parameter is used.
    • /tr TaskRun Changes the program that the task runs. Type the fully qualified path and file name of an executable file, script file, or batch file. If you omit the path, Schtasks.exe assumes that the file is in the Systemroot\System32 folder. The specified program replaces the original program that is run by the task.
    • /ru [Domain\]User | "System" Changes the user account for the task.
    • /rp Password Changes the account password for the task. Type the new password.
    • /? Displays help at the command prompt.
    
    
  
  
• Schtasks /Run
  
  Starts a scheduled task immediately. The run operation ignores the schedule, but uses the program file location, user account, and password that are saved in the task to run the task immediately.
  
  • Syntax:schtasks /run /tn TaskName [/s computer [/u [domain\]user /p password]] /?
  • Parameters:
    
    • /tn TaskName Identifies the task. This parameter is required.
    • /s Computer Specifies the name or IP address of a remote computer with or without backslash characters. The default is the local computer.
    • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who it logged on to the computer that is running Schtasks.
    • /p password Specifies the password of the user account that you specified in the /u parameter. This parameter is required when the /u parameter is used.
    • /? Displays help at the command prompt.
  
  
• Schtasks /End
  
  Stops a program that was started by a task.
  
  • Syntax: schtasks /end /tn TaskName [/s computer [/u [domain\]user /p password]] /?
  • Parameters:
    
    • /tn TaskName Identifies the task that started the program. This parameter is required.
    • /s Computer Specifies the name or IP address of a remote computer with or without backslash characters. The default is the local computer.
    • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who is logged on to the computer that is running Schtasks.
    • /p password Specifies the password of the user account that is specified in the /u parameter. This parameter is required when the /u parameter is used. /? Displays help.
  
  
• Schtasks /Delete
  
  Deletes a scheduled task.
  
  • Syntax:schtasks /delete /tn {TaskName | *} [/f ] [/s computer [/u [domain\]user/p password]] [/? ]
  • Parameters:
    
    • /tn {TaskName | *} Identifies the task being deleted. This parameter is required.
      
      • TaskName Deletes the named task.
      • * Deletes all the scheduled tasks on the computer.
    • /f Suppresses the confirmation message. The task is deleted without warning.
    • /s Computer Specifies the name or IP address of a remote computer with or without backslash characters. The default is the local computer.
    • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who is logged on to the computer that is running Schtasks.
    • /p password Specifies the password of the user account that you specified in the /u parameter. This parameter is required when the /u parameter is used.
    • /? Displays help at the command prompt.
    
    
  
  
• Schtasks /Query
  
  Displays all the tasks that are scheduled to run on the computer, including those that are scheduled by other users:
  
  • Syntax:schtasks [/query] [/fo {TABLE | LIST | CSV}] [/nh ] [/v] [/s computer [/u [domain\]user/p password]]
  • Parameters:[/query] The operation name is optional. Typing schtasks without any parameters performs a query.
  • /fo {TABLE | LIST | CSV} Specifies the output format. TABLE is the default. /nh Omits column headings from the table display. This parameter is valid with the TABLE and CSV output formats.
  • /v Adds advanced properties of the tasks to the display. Queries using /v should be formatted as LIST or CSV.
  • /s Computer Specifies the name or IP address of a remote computer with or without backslash characters. The default is the local computer.
  • /u [domain\]user Runs the command with the permissions of the specified user account. By default, the command runs with the permissions of the user who is logged on to the computer that is running Schtasks.
  • /p password Specifies the password of the user account that is specified in the /u parameter. This parameter is required when the /u parameter is used.
  • /? Displays help at the command prompt.

How to Create a Scheduled Task

To create a scheduled task:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type net start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, type schtasks /create /tn "Application_Name" /tr c:\apps\Application_Name /sc Value /st HH:MM:SS /ed MM/DD/YYYY, and then press ENTER. Note that you may have to change the parameters for your situation. For example, you might type schtasks /create /tn "My App" /tr c:\apps\myapp.exe /sc daily /st 08:00:00 /ed 12/31/2004 This example schedules the MyApp program to run once a day, every day, at 8:00 A.M. until December 31, 2004. Because it omits the /mo parameter, the default interval of 1 is used to run the command every day.

How to Change a Scheduled Task

To change a scheduled task:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, typenet start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, typeschtasks /change /tn TaskName [/s computer [/u [domain\]user /p password]] [/tr TaskRun] [/ru [Domain\]User | "System"] [/rp Password] , and then press ENTER. Note that you may have to change the parameters for your situation. For example, to change the program that a task runs, type: schtasks /change /tn "Application_Name" /tr C:\File_Path\Application_Name.exe

How to Run a Scheduled Task

To manually run a scheduled task outside its schedule:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type net start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, type schtasks /run /tn TaskName [/s computer [/u [domain\]user /p password]] , and then press ENTER. Note that you may have to change the parameters for your situation. For example, to run a task on the local computer, type schtasks /run /tn "Task_Name" .

How to End a Scheduled Task

To end a scheduled task:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type net start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, type schtasks /end /tn TaskName [/s computer [/u [domain\]user /p password]] , and then press ENTER. For example, to end the instances of a program that was started by a scheduled task on a local computer, type schtasks /end /tn "Task_Name".

How to Delete a Scheduled Task

To delete a scheduled task:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type net start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, type schtasks /delete /tn {TaskName | *} [/f] [/s computer [/u [domain\]user /p password]], and then press ENTER. For example, to delete all tasks scheduled for the local computer, type schtasks /delete /tn * /f.

How to Perform a Query of Scheduled Tasks

To perform a query of scheduled tasks:

1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type net start, and then press ENTER to display a list of currently running services. If Task Scheduler is not displayed in the list, type net start "task scheduler", and then press ENTER.
3. At the command prompt, type schtasks /query , and then press ENTER. Output from this example displays a table of tasks that have been scheduled to run.

For more information about how to use Schtasks.exe, search for Schtasks.exe in WindoAfter the specified time elapses, Schtasks does not start the task again until the start time recurs. By default, task schedules have no maximum duration. This parameter is optional and valid only with a MINUTE or HOURLY schedule.
ws Server 2003 Help.

For further information on the Schtasks command, go to the following Microsoft Web page:
Schtasks (Schtasks)



APPLIES TO

• Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
• Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
• Microsoft Windows Server 2003, Standard Edition (32-bit x86)
• Microsoft Windows Server 2003, Web Edition
• Microsoft Windows XP 64-Bit Edition Version 2003
• Microsoft Windows Small Business Server 2003 Standard Edition
• Microsoft Windows Small Business Server 2003 Premium Edition