September 2024
Intermediate to advanced
1002 pages
23h 43m
German
Content preview from PowerShell Kochbuch, 4. Auflage
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Kapitel 8. Utility-Aufgaben
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8.0 Einleitung
Wenn du ein Skript schreibst oder einfach nur die interaktive Shell benutzt, gibt es eine Handvoll einfacher, aber nützlicher Anforderungen: Befehle messen, Zufallszahlen ermitteln und mehr.
8.1 Abrufen von Systemdatum und -zeit
Problem
Du willst das Systemdatum abfragen.
Lösung
Um das Systemdatum zu erhalten, führe den Befehl Get-Date aus.
Diskussion
Der Befehl Get-Date erzeugt eine umfangreiche objektbasierte Ausgabe, sodass du das Ergebnis für viele datumsbezogene Aufgaben verwenden kannst. Zum Beispiel, um den aktuellen Wochentag zu ermitteln:
PS > $date = Get-Date PS > $date.DayOfWeek Sunday
Wenn du das Datum für die Ausgabe formatieren möchtest (z. B. als Logfile-Stempel), siehe Rezept 5.13.
Weitere Informationen über das Cmdlet Get-Date findest du, indem du Get-Help Get-Date.
Weitere Informationen zur Arbeit mit Klassen aus dem .NET Framework findest du in Rezept 3.8.
8.2 Messen der Dauer eines Befehls
Problem
Du willst wissen, wie lange ein Befehl zur Ausführung braucht.
Lösung
Um die Dauer eines Befehls zu messen, verwende das cmdlet Measure-Command:
PS > Measure-Command { Start-Sleep -Milliseconds 337 } Days : 0 Hours : 0 Minutes : 0 Seconds : 0 Milliseconds : 339 Ticks : 3392297 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.