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Clear-EventLog

  • Reference
Module:
Microsoft.PowerShell.Management

Clears all entries from specified event logs on the local or remote computers.

Syntax

Clear-EventLog
     [-LogName] <String[]>
     [[-ComputerName] <String[]>]
     [-WhatIf]
     [-Confirm]
     [<CommonParameters>]

Description

The Clear-EventLog cmdlet deletes all of the entries from the specified event logs on the local computer or on remote computers. To use Clear-EventLog, you must be a member of the Administrators group on the affected computer.

The cmdlets that contain the EventLog noun (the EventLog cmdlets) work only on classic event logs. To get events from logs that use the Windows Event Log technology in Windows Vista and later versions of Windows, use the Get-WinEvent cmdlet.

Examples

Example 1: Clear specific event log types from the local computer

Clear-EventLog "Windows PowerShell"

This command clears the entries from the Windows PowerShell event log on the local computer.

Example 2: Clear specific multiple log types from the local and remote computers

Clear-EventLog -LogName ODiag, OSession -ComputerName localhost, Server02

This command clears all of the entries in the Microsoft Office Diagnostics (ODiag) and Microsoft Office Sessions (OSession) logs on the local computer and the Server02 remote computer.

Example 3: Clear all logs on the specified computers then display the event log list

Clear-EventLog -LogName application, system -confirm

This command prompts you for confirmation before deleting the entries in the specified event logs.

Example 4: Clear all logs on the specified computers then display the event log list

function clear-all-event-logs ($computerName="localhost")
{
   $logs = Get-EventLog -ComputerName $computername -List | ForEach-Object {$_.Log}
   $logs | ForEach-Object {Clear-EventLog -ComputerName $computername -LogName $_ }
   Get-EventLog -ComputerName $computername -list
}

clear-all-event-logs -ComputerName Server01

Max(K) Retain OverflowAction        Entries Log
------ ------ --------------        ------- ---
15,168      0 OverwriteAsNeeded           0 Application
15,168      0 OverwriteAsNeeded           0 DFS Replication
512         7 OverwriteOlder              0 DxStudio
20,480      0 OverwriteAsNeeded           0 Hardware Events
512         7 OverwriteOlder              0 Internet Explorer
20,480      0 OverwriteAsNeeded           0 Key Management Service
16,384      0 OverwriteAsNeeded           0 Microsoft Office Diagnostics
16,384      0 OverwriteAsNeeded           0 Microsoft Office Sessions
30,016      0 OverwriteAsNeeded           1 Security
15,168      0 OverwriteAsNeeded           2 System
15,360      0 OverwriteAsNeeded           0 Windows PowerShell

This function clears all event logs on the specified computers and then displays the resulting event log list.

Notice that a few entries were added to the System and Security logs after the logs were cleared but before they were displayed.

Parameters

-ComputerName

Specifies a remote computer. The default is the local computer.

Type the NetBIOS name, an Internet Protocol (IP) address, or a fully qualified domain name of a remote computer. To specify the local computer, type the computer name, a dot (.), or localhost.

This parameter does not rely on Windows PowerShell remoting. You can use the ComputerName parameter of Get-EventLog even if your computer is not configured to run remote commands.

Type:String[]
Aliases:Cn
Position:1
Default value:Local computer
Required:False
Accept pipeline input:True
Accept wildcard characters:False

-Confirm

Prompts you for confirmation before running the cmdlet.

Type:SwitchParameter
Aliases:cf
Position:Named
Default value:False
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-LogName

Specifies the event logs. Enter the log name (the value of the Log property not the LogDisplayName) of one or more event logs, separated by commas. Wildcard characters are not permitted. This parameter is required.

Important

This parameter is supposed to accept values from the pipeline by property name. However, there is a bug that prevents this from working. You must pass a value using the parameter directly.

Type:String[]
Aliases:LN
Position:0
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type:SwitchParameter
Aliases:wi
Position:Named
Default value:False
Required:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

None

You cannot pipe objects to Clear-EventLog.

Outputs

None

This cmdlet does not generate any output.

Notes

  • To use Clear-EventLog on Windows Vista and later versions of Windows, start Windows PowerShell with the Run as administrator option.