Retrieving commands entered at the Windows PowerShell command prompt
When you enter a command at the command prompt, PowerShell maintains a record of that command so that you can reuse it. That record is added to the command history, which is maintained until you exit the PowerShell.
By default, PowerShell stores only 64 commands in the command history. If you exceed this number of commands in a single session, PowerShell maintains the most recent 64 commands. You can override the default number of commands by setting the $MaximumHistoryCount variable to a specified number. For example, the following command changes the command history retention to 100 commands:
When you set the $MaximumHistoryCount variable at the PowerShell command prompt, the change is in effect until you exit PowerShell. If you want the new variable value to be set as the default value for all of your PowerShell sessions, you should add the above command to the profile.ps1 file. The profile.ps1 file for the currently logged-on user is located at the following file system location: $home\"my documents"\PSConfiguration. After you add the command, be sure to save the profile.ps1 file and restart PowerShell.
Once commands have been saved to the command history, you can take any of the following steps to access one of those commands:
· Press the Up Arrow key to move backwards through the command history. The first time you press the Up Arrow key, PowerShell displays the last command that you ran in the current session. If you press the Up Arrow key again, the next-to-last command is displayed, and so on. Once you've located the command you're looking for, edit it as necessary and then press Enter.
· Press the Down Arrow key to move forward through the command history. The first time you press the Down Arrow key, PowerShell display the first command that you ran in the current session. If you press the Down Arrow key again, the second command is displayed, and so on. Once you've located the command you're looking for, edit it as necessary and then press Enter.
· Type one or more characters and then press F8 to display the last entered command that begins with those characters. If you press F8 again, PowerShell displays the second-to-last matching command, and so on. Once you've located the command you're looking for, edit it as necessary and then press Enter.
· Press F7 to display the command history. Use the Up Arrow and Down Arrow keys to scroll to the desired command. Once you've located the command you're looking for, press Enter to run the command.
· Press F7 to display the command history. To run one of the commands, press F9, type the number assigned to the command, as it appears in the list, and then press Enter to display the command at the command prompt. Edit the command as necessary, and then press Enter again to run the command.
In addition to taking one of these steps to run a command from the command history, you can also view a list of previous commands by using of the Get-History Cmdlets, as shown in the following example:
The command returns a list of the last 32 commands that you entered. You can also use the Get-History Cmdlet to retrieve a specific command by the number assigned to the command. (A number is assigned to each command in the order in which the command is entered.) For example, to retrieve the 12th command that you ran, enter the following command at the PowerShell command prompt:
Note that, by default, PowerShell assigns the alias "history" to the Get-History Cmdlet.
PowerShell also provides the Invoke-History Cmdlet to run a command in the command history. To use this Cmdlet, you must know the number of the command, which usually means first using the Get-History Cmdlet and then using the Invoke-History Cmdlet. For example, to run the 12th command in the command history, enter the following command:
This will run the original command as though you had entered it directly at the command prompt.
For information about history-related Cmdlets, use the help alias (for the Get-Help Cmdlet) plus the Cmdlet name. For example, to view information about the Get-History Cmdlet, enter the following command at the PowerShell command prompt:
For information about command line editing, enter the following command:
For information about automatic variables, enter the following command: