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Sat, Jan 31, 2015 11:13 pm

Searching Windows event logs with get-eventlog

If you want to search a Windows event log for occurrences of a particular eventid, you can use the Windows PowerShell cmdlet get-eventlog. E.g., to search the system event log, you would include that as a parameter after get-eventlog. If I wanted to search that log for all instances of the event id 5, I could use the command below:
c:\>powershell
Windows PowerShell
Copyright (C) 2014 Microsoft Corporation. All rights reserved.

PS c:\> get-eventlog "system" | where-object {$_.EventID -eq 5}

   Index Time          EntryType   Source                 InstanceID Message
   ----- ----          ---------   ------                 ---------- -------
     798 Nov 29 20:27  Error       Microsoft-Windows...            5 The des...


PS C:\>

Sometimes there may be many occurences of a particular eventid in a log file. You can limit the display to those before or after a particular date using -before or -after as shown below for a search of the application event log:

PS C:\> get-eventlog -LogName "application" | where-object {$_.EventID -eq 753}

   Index Time          EntryType   Source                 InstanceID Message
   ----- ----          ---------   ------                 ---------- -------
    6239 Jan 25 22:29  Information Microsoft-Windows...          753 The Blo...
    2108 Dec 27 21:17  Information Microsoft-Windows...          753 The Blo...
    2099 Dec 27 21:00  Information Microsoft-Windows...          753 The Blo...
    1380 Nov 29 22:18  Information Microsoft-Windows...          753 The Blo...
    1359 Nov 29 22:05  Information Microsoft-Windows...          753 The Blo...
    1278 Nov 29 20:37  Information Microsoft-Windows...          753 The Blo...


PS C:\> get-eventlog -LogName "application" -before 2015-01-01 | where-object {$
_.EventID -eq 753}

   Index Time          EntryType   Source                 InstanceID Message
   ----- ----          ---------   ------                 ---------- -------
    2108 Dec 27 21:17  Information Microsoft-Windows...          753 The Blo...
    2099 Dec 27 21:00  Information Microsoft-Windows...          753 The Blo...
    1380 Nov 29 22:18  Information Microsoft-Windows...          753 The Blo...
    1359 Nov 29 22:05  Information Microsoft-Windows...          753 The Blo...
    1278 Nov 29 20:37  Information Microsoft-Windows...          753 The Blo...


PS C:\> get-eventlog -LogName "application" -after 2015-01-01 | where-object {$_
.EventID -eq 753}

   Index Time          EntryType   Source                 InstanceID Message
   ----- ----          ---------   ------                 ---------- -------
    6239 Jan 25 22:29  Information Microsoft-Windows...          753 The Blo...


PS C:\>

If you only want to see error events in a log, e.g. errors in the application log, you could use a command such as the one shown below:

PS C:\> get-eventlog -LogName "application" -entrytype error

   Index Time          EntryType   Source                 InstanceID Message
   ----- ----          ---------   ------                 ---------- -------
    6599 Jan 31 20:19  Error       Microsoft-Windows...         2005 There w...
    6596 Jan 31 20:19  Error       Microsoft-Windows...         2005 There w...
    6455 Jan 28 22:38  Error       Microsoft-Windows...         2006 There w...
    6427 Jan 28 02:13  Error       Microsoft-Windows...          513 Cryptog...
    6383 Jan 27 21:55  Error       VSS                          8194 Volume ...
    6340 Jan 26 19:31  Error       VSS                          8194 Volume ...
    6240 Jan 25 22:29  Error       Microsoft-Windows...          513 Cryptog...

You can get help on using the get-eventlog cmdlet by typing help get-eventlog at a PowerShell prompt.

PS C:\> help get-eventlog

NAME
    Get-EventLog

SYNTAX
    Get-EventLog [-LogName] <string> [[-InstanceId] <long[]>] [-ComputerName
    <string[]>] [-Newest <int>] [-After <datetime>] [-Before <datetime>]
    [-UserName <string[]>] [-Index <int[]>] [-EntryType <string[]> {Error |
    Information | FailureAudit | SuccessAudit | Warning}] [-Source <string[]>]
    [-Message <string>] [-AsBaseObject]  [<CommonParameters>]

    Get-EventLog [-ComputerName <string[]>] [-List] [-AsString]
    [<CommonParameters>]


ALIASES
    None


REMARKS
    Get-Help cannot find the Help files for this cmdlet on this computer. It
    is displaying only partial help.
        -- To download and install Help files for the module that includes
    this cmdlet, use Update-Help.
        -- To view the Help topic for this cmdlet online, type: "Get-Help
    Get-EventLog -Online" or
           go to http://go.microsoft.com/fwlink/?LinkID=113314.




PS C:\>

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