Category Archives: Windows knowhow

Howto do some things in Windows

Windows knowhow

Windows: Only register primary IP Address in DNS

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Hi,

if you want to change the IP Address (new Address is in the same subnet) a of Windows Server by a minimal downtime for the users?

In pure Active Directory domains this is not a problem because the server itself updates its A Record at the DNS server and the Active Directory replicates the entry immediately.
In large environments with a heterogeneous DNS structure the TTL of the DNS entry respectively of the DNS zone becomes very important, because the entry is cached for this time by the requesting server, so the time when the new DNS A record reaches  each DNS Server can take some time.
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Windows knowhow

Windows: Howto terminate a RDP Session remotely by command line

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Hi,

when a RDP sessions hangs there are multiple ways to destroy it. The command line way:

Identify the RDP Session ID. Use quser


C:\>quser /Server:YourWindowsServer
 USERNAME              SESSIONNAME        ID  STATE   IDLE TIME  LOGON TIME
 winuser               rdp-tcp#6           2  Active          3  24.09.2014 22:26

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Windows knowhow

Windows: Automatic Update does not install updates

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Hi,

a Customer calls me that his Windows Clients won’t install some Updates and the boxes does not submit their update states to the WSUS Server which runs at Windows Update Server 3 SP2.

At the clients I checked the Windows Update Logfile C:\Windows\WindowsUpdate.log and found many errors like these:

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Windows knowhow

Windows: Backup with diskshadow.exe

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Hello,

Windows Server 2008 and alter version are shipped with a tool called diskshadow. This program can be used to create snapshots of disks and expose them as Folder or as DriveLetter means files are in a consistent state and you can save openfiles.

Some examples. Starting diskshadow. It accept a  parameter /l  for a logfile. And a Parameter /s for a (diskshadow) script file to execute. diskshadow has the same “look and feel” like diskpart 🙂  and start with a prompt:

C:\Windows\system32>diskshadow
Microsoft DiskShadow version 1.0
Copyright (C) 2013 Microsoft Corporation
On computer:  windev,  12.06.2014 20:28:33
DISKSHADOW>

First set diskshadow in defined state with reset

DISKSHADOW> reset
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Windows knowhow

Windows: Cannot bring up Cluster Networkname Resources

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Hi,

a customer has, accidentally, deleted multiple Active Directory Computer objects which correspond to Network Name Resources of a Windows Cluster 🙁 .

The cluster network name itself was also affected and no backup of the AD Database to restore the objects was available.

All solutions that I’ve found to get the cluster working again are based on the restore of the AD objects.

But there is also another way respective hack 🙂 . This works for me on a Windows 2008 R2 Cluster.
Typical error are:

  • Event ID 1207 is logged to the Eventlog: “Unable to get Computer Object using GUID” “There is no such object on the server.”
  • Or in the C:\Windows\Cluster\Reports\cluster.log file (exported with cluster.exe log g)
    Network Name <Clustername>: Unable to Logon. winError 1326

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