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This is a Quick Powershell note how you can use Powershell to read RSS feeds. This is pretty simple you can use the .NET class WebClient.
$rssFeed = [xml](New-Object System.Net.WebClient).DownloadString('http://www.thomasmaurer.ch/feed/')
$rssFeed.rss.channel.item | Select-Object title -First 5
This shows you how you can search in files for a specific content with Windows Powershell. This “replaces” the Windows command-line utility “findstr”. In the Unix/Linux world you mostly use the command grep for doing the same.
grep syntax
grep (options) files.txt
grep example
grep "text I search" *.log
In Windows Powershell we can use the Select-String to search strings in files
Select-String -Path C:\temp\*.log -Pattern "Contoso"
If you need some more options, for example you need also check subfolders (-Recurse) or you need additional filter for files you wanna check, you can use the Get-Childitem first.
Get-ChildItem C:\temp -Filter *.log -Recurse | Select-String "Contoso"
If you have to copy all the files with a specific content, you can simply add a Copy-Item cmdlet.
Get-ChildItem C:\temp -Filter *.log -Recurse | Select-String "Contoso" | Copy-Item -Destination C:\temp2
More Information about Select-String:
With this little Powershell Script you can run Powershell Commands on multiple Remotehosts even if those are not in an Active Directory.
# Config
$Servers = @("Server01", Server02)
$Cred = Get-Credential # Add Credentials for all Servers (Domain or non-Domain)
# Run Command (for example Get-Service | Where-Object {$_.Name -eq "BITS"}
foreach ($Server in $Servers) {
Invoke-Command -ComputerName $Server -Credential $Cred {Get-Service | Where-Object {$_.Name -eq "BITS"}}
}
Important:
You have to enable Powershell Remoting on the Remotehost with Enable-PSRemoting
This is small guide which allows you to create Remote Powershell Sessions (like SSH). It allows you to create connection to Host which have Powershell Version 2.
Run Powershell 2.0 on the Remotehost and run the following Cmdlet.
Enable-PSRemoting
This command starts the WinRM service if it’s not allready started and sets the startup type to automatic. Adds firewall exceptions for WS-Management communications and creates a listener to accept requests.
On the Local Computer run Powershell and run the following Cmdlet. This allows you to connect to any host. It also starts WinRM if its not already started.
Set-Item WSMan:\localhost\Client\TrustedHosts *
After that you may have to restart the WinRM service
Restart-Service winrm -Force
There are two ways to create a new PS Remotesession.
New-PSSession -ComputerName Server01
With Get-PSSession you can list all active sessions. Now you can enter a active Session with Enter-PSSession and the ID
Enter-PSSession 2
A quicker way to do that, you can simply use Enter-PSSession to create a new Session and directly connect to this Session.
Enter-PSSession -ComputerName Server02
To leave a Powershell Remotesession you can simply use the Exit-PSSession
Exit-PSSession
To close a Powershell Remotesession you can list all active Sessions with Get-PSSessions and close them with Remove-PSSession.
Get-PSSession | Remove-PSSession
To run a command on a Remotehost you can use the -ComputerName parameter.
Get-Service -ComputerName Server02
Get-Service -ComputerName Server02 | Where-Object {$_.Name -eq "BITS"}
With this little snippet you can run commands on multiple Hosts
$Servers = @("Server01", "Server02")
foreach ($Server in $Servers) {
Write-Host "Server: " $server
Get-Service -ComputerName $server | Where-Object {$_.Name -eq "BITS"}
}
This is a simple Powershell script which deletes Files older than some days. You can use it to cleanup old logfiles or other things. If you run the script the first time you can add the “-WhatIf” parameter after Remove-Item command.
# Delete all Files in C:\temp older than 30 day(s)
$Path = "C:\temp"
$Daysback = "-30"
$CurrentDate = Get-Date
$DatetoDelete = $CurrentDate.AddDays($Daysback)
Get-ChildItem $Path | Where-Object { $_.LastWriteTime -lt $DatetoDelete } | Remove-Item
If you need to delete files in subfolders too, you can use this script. This is the same script with the Get-Childitem parameter “-Recurse”.
# Delete all Files in C:\temp older than 30 day(s)
$Path = "C:\temp"
$Daysback = "-30"
$CurrentDate = Get-Date
$DatetoDelete = $CurrentDate.AddDays($Daysback)
Get-ChildItem $Path -Recurse ( | Where-Object { $_.LastWriteTime -lt $DatetoDelete } | Remove-Item
Quest released PowerGUI Pro and PowerGUI 2.3. Both get really cool new features. In the Pro version the most changes are done in the MobileShell. In the free version the most changes are done in the support for snippets. And they now support virtualization now with the VMware Powerpack right build in.
If you wanna know more about the changes of PowerGUI visit poshoholic.com.