powershell-4.0

问题 I wrote a simple script for an internship, which trawls through a provided directory and deletes any file older than a specified number of days. I've spent all my free time today attempting to tighten it up. Here's what I've got so far: function delOld($dir, $numDays){ $timespan = new-timespan -days $numDays $curTime = get-date get-childItem $dir -Recurse -file | where-object {(($curTime)-($_.LastWriteTime)) -gt $timespan} | remove-Item -whatif } Here is an example of a call of the function:

问题 How do I test if the first line of a text file is terminated with \r or \n? I tried various renditions similar to the following. I'm not sure that the string imported into powershell (first line of the file) even contains the invisible characters. I also tried using the StreamReader method to read the line to no avail. $master = Get-Content $masterFilename | Select-Object -First 1 if ($master.Contains("\r|\n")) { write-host "you betcha, there's a carriage return or line feed" } Thank you. 回答1

问题 This is my code : $a = @() for ($i = 0; $i -lt 5; $i++) { $item = New-Object PSObject $item | Add-Member -type NoteProperty -Name 'Col1' -Value 'data1' $item | Add-Member -type NoteProperty -Name 'Col2' -Value 'data2' $item | Add-Member -type NoteProperty -Name 'Col3' -Value 'data3' $item | Add-Member -type NoteProperty -Name 'Col4' -Value 'data4' $a += $item } With this code I'm able to have a result like this: Col1 Col2 Col3 Col4 ---- ---- ---- ---- 0 1 2 3 1 2 3 4 2 3 4 5 3 4 5 6 4 5 6 7

问题 I am trying to launch an elevated CMD window from PowerShell but I am running into some issues. Below is the Code I have now. There is an admin account on the machine that has the username of "test" and a Password of "test" $username = "test" $password = ConvertTo-SecureString "test" -AsPlainText -Force $cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $password Start-Process "cmd.exe" -Credential $cred This is all working fine for running an

问题 How can I convert the below exported text to csv so that i can use it as objects in powershell. Eg: where{$_.qlimit -eq 27} Text: samid qlimit qused Administrator -1 0 Guest -1 0 admin 27 8 krbtgt -1 0 r -1 0 admin2 44 0 回答1: Use the Get-Content cmdlet to load the file, replace two or more whitespaces with a comma and convert it to CSV using the ConvertFrom-Csv cmdlet: $object = (Get-Content 'your_file').Trim() -replace '\s{2,}', ',' | ConvertFrom-Csv If you now query your object: $object |

问题 $a = @() How do I check if $a above is empty (which it is). I would like to get $true as answer. 回答1: That's not an associative array, it's a regular array, but the answer is the same. Use .Count and compare to 0. An associative array is called a [hashtable] in PowerShell and its literal form uses @{} (curly braces). @{}.Count -eq 0 # hashtable (associative array) @().Count -eq 0 # array 回答2: Arrays have Count property, and you can check if this value is 0. So the condition you would check

问题 I'm writting a PowerShell script that configures some things in Active Directory. I need to run it as a specific user in order to get the right permissions for the process, currently i'm running the .ps1 file through a .bat file, so I can choose "run as a different user" or "run as administrator". What I'm tryng to achieve is that inside the script I will ask the user for the right credentials, and then elevate the session to run with the inputed user creds. I've tried using this within my

问题 I have several processes running that I'd like to attach to the VS debugger via powershell. Currently, I can do this: Get-Process NServiceBus.Host | Debug-Process If there is only one process, then I am prompted to select the correct debugger and I can continue. However, if there are more than one processes, when I'm prompted to select a debugger for the second process, I am unable to select the currently running instance of Visual Studio. How can I use powershell to attach multiple processes

问题 I have made this very simple DSC script. Which basically creates web application in default website. Configuration ConfigureWebApp { param ($MachineName) Import-DscResource -Module xWebAdministration Node $MachineName { xWebApplication NewWebApplication { Name = "MyApp" Website = "Default Web Site" WebAppPool = "DefaultAppPool" PhysicalPath = "C:\Inetpub\wwwroot\MyApp" Ensure = "Present" } } } cd "C:\Dsc\scripts" ConfigureWebApp -MachineName "WIN-KPURIN2B87H" When I run generated MOF file, it

问题 I have a script that takes 2 parameters (name and location). I put the name and location into a txt file as per this post here Powershell parameters from file. I got prompted to put in value for the 2nd parameter: Import-Csv 'C:\temp\paramtest.txt' | % { C:\temp\script\paramtest.ps1 @_ } cmdlet paramtest.ps1 at command pipeline position 1 Supply values for the following parameters: param2:** This is what my .txt look like: "param","param2" "foo","c:\temp" "bar","c:\temp" "foobar","c:\temp"