| You want to replace a dll on a system, but you get access denied, although you’re admin, have the necessary rights.. so which process is locking the particular file/library. I know, there is handles.exe from Sysinternal Suite, and plenty other tools that do the trick.But, you don’t need third-party tools to get the answer, just use tasklist.exe or PowerShell. |
All registry keys have a value associated with called the Last Write Time. This is analogous to the last modification time for a file. When ever the registry key or one if its values has been created, modified, or deleted the value is updated to the current local system time. Unfortunately, there is no Last Write Time associated with a registry value, but it can be infered from the Last Write Time of the key.
Here is a PowerShell script to read the Last Write Time for a registry key.
Usage:
Get-RegKeyLastWriteTime.ps1 <Key> <SubKey>
IP scanner for the poor ones 
Just open up a cmd.exe and change the ip range..
C:\>FOR /L %x in (1,1,255) do ping -n 1 192.168.2.%x | find /I "reply" >> c:\temp\pingresult.txt
The above command uses a FOR loop to ping each device and looks for "Reply" in the output. If there is a "Reply" then the host is up.. Results will be written to C:\temp\pingresults.txt
Or the PowerShell version:
C:\> 1..255 | foreach-object { (new-object System.Net.Networkinformation.Ping).Send("192.168.2.$_") } | where-object {$_.Status -eq "success"} | select Address
Remote Access Without Admin Privileges
In PowerShell v.2, remote access is available only to users who hold local administrator privileges. So, even if you do have appropriate remote access to a machine, , you cannot remotely access the system if you are not an Admin. This is not a technical limitation, though, just a safe default. You should use this line to change it :
Set-PSSessionConfiguration -Name Microsoft.PowerShell -showSecurityDescriptorUI
Generate PC Lists
One easy way of creating lists of PC names or IP address ranges etc is a simple pipeline like this:
1..40 | Foreach-Object { ‘PC-W7-A{0:000}’ -f $_ }
Use the -f operator to format the number. In this example, it will always be three-digit.
You can use Sort-Object to sort simple variable types. Have a look at the following:
‘Tom’, ‘Chris’, ‘Judy’, ‘Alan’ | Sort-Object
Input can come from a different command. If you’d like to get seven random lottery numbers, you should try this:
1..49 | Get-Random -Count 7 | Sort-Object
You’ll find that when you feed complex objects into Sort-Object, you should specify the object property you want to sort on (or else Sort-Object will pick one by itself):
Get-ChildItem $env:windir | Sort-Object Length
Here are some more examples:
Get-HotFix | Sort-Object InstalledOn
Get-ComputerRestorePoint | Sort-Object Description
| Using Microsoft Exchange 2007 / 2010 Management Shell (PowerShell with extensions), you can pull out some very exciting statistics. That was never that easy in the pre Exchange 2007 era. |  |
| Ok, this one’s is cool i think. Whenever i needed a large dummy file, i opened up notepad, write ASDFASDFASDFA CTRL-A, CTRL-C, CTRL-V,CTRL-V,CTRL-V,CTRL-V. CTRL-A, CTRL-C, CTRL-V,CTRL-V,CTRL-V,CTRL-V,CTRL-V.. Then i saved the file, opened up a CMD-Shell and wrote copy dummyFile.txt+dummyFile.txt+dummyFile.txt until the file was large enough.. ok, there’s fsutil.exe which does the same in a much more efficient manner.. OR, unleash the Power of .NET – no, you don’t have to start programming using Visual Studio, just open up PowerShell.. |  |
| Schtasks.exe – Enables an administrator to create, delete, query, change, run, and end scheduled tasks on a local or remote computer. Running Schtasks.exe without arguments displays the status and next run time for each registered task. If you have jobs that need to execute regularly, you can manage them with a PowerShell script and make it a scheduled task: |
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| Okay, this post I’m going to write down for my personal notes but also for you.. Ever needed to delete a specific file, in my case in need to delete (remove-item) all *.pdb files in one of my Visual Studio Solution.. recursive of course. To get a list of Files use the Get-ChildItem CmdLet. Extend that command using the –rec or –recurse parameter – so you’ll get all the files recursively, starting from the current path / directory. |
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