Correctly Returning Exit Codes - Power Tips - Powershell.com – Powershell Scripts, Tips and Resources

Correctly Returning Exit Codes - Power Tips - Powershell.com – Powershell Scripts, Tips and Resources

Catching Errors - Power Tips - Powershell.com – Powershell Scripts, Tips and Resources

Catching Errors - Power Tips - Powershell.com – Powershell Scripts, Tips and Resources

Great tip on catching errors!

Execution Policy

While a necessary evil, Execution Policy can sometimes be a pain.

Here's a couple of alternatives to setting the execution policy to Unrestricted:

Powershell.exe –noprofile –executionpolicy bypass –file "C:\Scripts\myScript.ps1"

Get-Content 'C:\Scripts\myScript.ps1' | powershell.exe -noprofile -

(The minus (-) is important!)

SSH.Net - Powershell

Thanks to SSH.Net lib, you can easily SSH into a linux server from powershell, upload/download files and run commands:
The following will create a folder in the users home called TestFolder, upload a file to that folder, then runs a command deleting teh folder:

param(
 [parameter(Mandatory = $true)] [string] $serverName,
 [parameter(Mandatory = $true)] [string] $userName,
 [parameter(Mandatory = $true)] [string] $password
)

[Void][Reflection.Assembly]::LoadFrom(".\Renci.SshNet.dll")
$sourceFile = "c:\Scripts\test.txt"
$destFile = "test.txt"
$destFolder = "/home/$userName/TestFolder"
$sshclient = New-Object Renci.SshNet.SshClient($serverName,$userName,$password )
$sshclient.Connect()
if ($sshclient.IsConnected){
 $sftp = New-Object Renci.SshNet.SftpClient($sshclient.ConnectionInfo)
 $sftp.Connect()
 if ($sftp.IsConnected){
  if (!$sftp.Exists($destFolder)){
   $sftp.CreateDirectory($destFolder) 
  }
  $sftp.ChangeDirectory($destFolder)
  $sftp.UploadFile([System.IO.File]::OpenRead($sourceFile), $destFile)
  write-host "File Exists " $([bool](($sftp.ListDirectory(".") | select Name) -match "test.txt"))
  $sftp.Disconnect()
  
 }
 $o = $sshclient.RunCommand("rm /home/$userName/TestFolder -R")
 $o.Result
 $sshclient.Disconnect()
}

Match string between same delimiters multiple times

Been looking for something like this for a while...

I had a string similar to below:

"thisis%a%%test%string%which%should%will%possibly%work%"

and needed to extract the text between the "%"'s, but not between the end "%" and the next starting "%".

Using regular expressions (in powershell), the following pattern will work:

"%[^%]*?(|).*?%"

The "?" after each "*" allows for greediness(multiple text blocks in the string)

Complete code:

[regex]$r = "%[^%]*?(|).*?%"
$r.Matches("thisis%a%%test%string%which%should%will%possibly%work%") | %{$_.Value}

The following is matched:
%a%
%test%
%which%
%will%
%work%
While the following is ignored:
%string%
%should%
%possibly%