Powershell, Karten 31-60

Der provider unterstützt -WhatIf and -Confirm Parameters

enabling you to “test” certain actions before committing to them

the provider permits you to specify alternate credentials when connecting to data stores.

the provider supports the use of transactions; which allows you to use the provider to make several changes; and then either roll back or commit those changes as a single unit

get-psdrive

wildcards *;? sind bei manchen Providern; z.B Registry erlaubt. Wenn Powershell Wildcards nicht interpretieren soll muss dies mit dem Parameter -LiteralPath anstelle von -Path angegeben werden.

CliXML can hold more information than a flat CSV file

It's better for diff with compare-object

Out-File also provides additional parameters that let you specify alternative character encodings (such as UTF8 or Unicode)

Dir | Out-Default | Out-Host

In der Variable$confirmpreference

Here’s how it works: when a cmdlet’s internal impact level is equal to or higher than the shell’s $ConfirmPreference setting, the shell will automatically ask; “Are you sure?"

MIt dem Paramenter -confirm

Der Parameter -whatif zeigt an was gemacht werden würde.

get-member

get-location

get-eventlog -list

get-pssnapin #Loaded Snappins

get-pssnapin -registered #installed and available, but not necessary loaded

get-childitem env: #Das gleiche wie set unter cmd

get-content env:psmodulepath

Export from a current powershell where everyting is loaded you want: Export-Console c:\myshell.psc

Create a shortcut: %windir%\system32\WindowsPowerShell\v1.0\powershell.exe -noexit -psconsolefile c:\myshell.psc

1.) $pshome/profile.ps1—This will execute for all users of the computer, no matter
which host they’re using (remember that $pshome is predefined within
PowerShell and contains the path of the PowerShell installation folder)

2.) $pshome/Microsoft.PowerShell_profile.ps1—This will execute for all users of
the computer if they’re using the console host.If they’re using the PowerShell
ISE, the $pshome/Microsoft.PowerShellISE_profile.ps1 script will be executed
instead.

3.) $home/Documents/WindowsPowerShell/profile.ps1—This will execute only
for the current user (because it lives under the user’s home directory), no matter
which host they’re using.

4.) $home/Documents/WindowsPowerShell/Microsoft.PowerShell_profile.ps1—
This will execute for the current user if they’re using the console host. If they’re
using the PowerShell ISE, the $home/Documents/WindowsPowerShell/
Microsoft.PowerShellISE_profile.ps1 script will be executed instead.

If one or more of these scripts doesn’t exist, there’s no problem. The hosting application
will simply skip it and move on to the next one.

This is what we’ve been calling a “table row.” It represents a single thing; like a single process or a single service

This is what we called a “table column.” It represents one piece of information about an object; like a process name; process ID; or service status

This is what we called an “action.” A method is related to a single object and makes that object do something; like killing a process or starting a service

This is the entire set of objects; or what we’ve been calling a “table.”

Select-Object can’t remove the properties you don’t want; because the result wouldn’t be a object anymore. Instead; Select-Object creates a new kind of custom object called a PSObject (Bei Objects muss mit -expandproperty der string ausgelesen werden Bsp: Get-TagCategory "Patching" | select -expandproperty Cardinality; bei PSObjects ist das Property bereits der string)

get-date | gm #liefert ganz am Anfang der Auflistung den Typname -> System.DateTime

Pipe input ist erlaubt. Bsp: "command1 | command2" -> Prüft ob die Propertynamen von command1 und command2 übereinstimmen und verbindet diese.

Pipe input ist erlaubt. Bsp: "command1 | command2" prüft ob der TypeName von command1 mit einem Propertytyp von command2 überein stimmt. Mit get-member bei command1 kann der TypName verifiziert werden, via get-help command2 -full können die möglichen "Inputs" angeschaut werden.

Es kann nur 1 Parameter einem Property übergeben werden; evtl. dem falschen was zu Fehlern führt

Get-process | Select-Object -Property *,@{Name="Start Day"; Expression = {$_.StartTime.DayOfWeek}}

Anstelle von Name kann auch N, Label oder L  verwendet werden

Anstelle von Expression kann auch E verwendet werden

Wie in der Algebra, Ausrücke in Klammer werden immer zuerst ausgeführt

Get-Process -computerName (import-csv .\computers.csv | select -exp hostname)

Das -expandProperty packt das Objekt aus und liefert ein String Object (exp ist Kurzform).

the formatting system will display four or fewer properties -> it will use a table.

If there are five or more properties; it will use a list.