Until then, peace.This post is the second-and last-in a two-part series that covers defending your Windows environment against offensive PowerShell. If you have any questions, send email to me at or post your questions on the Official Scripting Guys Forum. I invite you to follow me on Twitter and Facebook. It is cool stuff and you do not want to miss it. Join me tomorrow when I have another guest blog by Honorary Scripting Guy and Microsoft PowerShell MVP, Sean Kearney, as he continues his series about using Windows PowerShell with Hyper-V. Hopefully, it will not be another year before I get to see you again. Thank you, Jonathan, for sharing your time and knowledge with us today. You can also use this to create an event log specifically for your script or to create a source for event logs other than the Application log. Additionally, you can leverage Windows PowerShell to make the change across multiple machines by supplying the ComputerName parameter. When it is installed on the computer, you don’t have to worry about it again. But the nice thing is that you only have to do this once for the source. To create a new source for an event log, administrative privileges are required. And if we check the event log entries, we should now see our test message.Īs you can see, the source is now populated with “My Script.” New-EventLog –LogName Application –Source “My Script”Īs you can see, the Write-EventLog now returns with no error. To fix our previous error, we can use the following line as an Administrator on the computer: Instead of elevating the application pool’s rights on all the servers, I used this cmdlet to create a new source, and then the custom code was happy to report to the event logs. The custom code being deployed needed to write information to the event logs, but the application pool account did not have the administrative rights to create the source. I have actually used this in some instances for custom code in a SharePoint farm. The New-EventLog cmdlet can be used not only to create a brand new event log on the computer, but it can also create a new source that can be used when you write to the event log. So, how in the world can we use the event log if we have to have a Source parameter but the source we want to use is not on the server? If you look back at the first screenshot, you will see another cmdlet in the list that will help us out: New-EventLog. I will explain a little more about this later. Note If you received a slightly different error that states not all event logs (Security) could be scanned, you need to run Windows PowerShell as an Administrator. What? You got an error message? I’m betting it is because your computer doesn’t have a source called “My Script.” Run this on your computer and then check the event logs. After running this command, I would expect a new message to show up in the Application event log. In this command, the LogName, Source, EventID, and Message are required parameters. Write-EventLog –LogName Application –Source “My Script” –EntryType Information –EventID 1 To try this out, I am going to write a test message to the Application event log. It looks like the one we probably need is Write-EventLog. To begin with, let’s flip over to the Windows PowerShell console and see what cmdlets are available that deal with the event logs. Why not use that same system to capture and report when one of your Windows PowerShell scripts goes wrong? The best thing is that you don’t even have to stick to errors. Now, how many of you like to get feedback from a script that you have running as a scheduled task? And now, how many simply write to a text file or simply forget about getting feedback unless you find that there is a problem?īy the end of this post, I will show you how you can leverage the premier logging system on any Windows Server: the event log! If you work in an enterprise, you most likely have some type of central monitoring system that collects errors from your event logs. How many of you like to get feedback from your Windows PowerShell scripts, either by a verbose switch or in some sort of log file? Great, you can put your hands down. I am happy to welcome back guest blogger, Jonathan Tyler… Jonathan is an active member of the Windows PowerShell community, and he has written other posts for the Hey, Scripting Guy! Blog. I see him from time-to-time, although he only lives a few hours away from us. While I was at TechEd in New Orleans, I had the chance to talk to Jonathan Tyler. Microsoft Scripting Guy, Ed Wilson, is here. Summary : Guest blogger, Jonathan Tyler, talks about how to write to Windows event logs by using Windows PowerShell-and avoid errors in doing so.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |