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    Describes how to get and run commands in the command history. 


    When you enter a command at the command prompt, Windows PowerShell 
    saves the command in the command history. You can use the commands 
    in the history as a record of your work. And, you can recall and run the  
    commands from the command history. 
  History Cmdlets 
      Windows PowerShell has a set of cmdlets that manage the command history. 
          Cmdlet (Alias)       Description 
          -------------------  ------------------------------------------ 
          Get-History (h)      Gets the command history. 
          Invoke-History (r)   Runs a command in the command history. 
          Add-History          Adds a command to the command history. 
          Clear-History (clh)  Deletes commands from the command history. 
  Keyboard Shortcuts for Managing History 
      In the Windows PowerShell console, you can use the following shortcuts 
      to manage the command history. 
      For other host applications, see the product documentation. 
          Use this key      To perform this action 
          -------------     ---------------------------------------------- 
          UP ARROW          Displays the previous command. 
          DOWN ARROW        Displays the next command. 
          F7                Displays the command history.  
                            To hide the history, press ESC. 
          F8                Finds a command. Type one or more characters, 
                            and then press F8. For the next instance,  
                            press F8 again. 
          F9                Find a command by history ID. Type the history 
                            ID, and then press F9. To find the ID, press F7. 
      The $MaximumHistoryCount preference variable determines the maximum 
      number of commands that Windows PowerShell saves in the command history. 
      The default value is 4096, meaning that Windows PowerShell saves the 4096 
      most recent commands, but you can change the value of the variable. 
      For example, the following command lowers the $MaximumHistoryCount to 
      100 commands: 
          $MaximumHistoryCount = 100 
      To apply the setting, restart Windows PowerShell.  
      To save the new variable value for all your Windows PowerShell 
      sessions, add the assignment statement to a Windows PowerShell profile. 
      For more information about profiles, see about_Profiles  
      For more information about the $MaximumHistoryCount preference 
      variable, see about_Preference_Variables  
  NOTE: In Windows PowerShell 2.0, the default value of the $MaximumHistoryCount 
        preference variable is 64. 
  Order of Commands in the History     
      Commands are added to the history when the command finishes executing, 
      not when the command is entered. If commands take some time to be  
      completed, or if the commands are executing in a nested prompt, the 
      commands might appear to be out of order in the history. (Commands 
      that are executing in a nested prompt are completed only when you exit  
      the prompt level.)