Windows PowerShell command line syntax

  Parameters  Command Line Parameters  param() and $args[]
  Pipelines   Pass objects down the pipeline.
  Objects     Working with objects.
  Looping commands: Do, foreach, ForEach-Object, Switch, While
  Date&Time   Date and Time Format patterns (DateTimeFormatInfo)
  Redirection Spool output to a file.
  Statements  Looping, If-Then-Else.
  Tab Completion for Cmdlets, Filenames & Variables.
  Transaction Manage transactions.

Variables

  Create Variables and assign values - basic Operators: + - / =
  Arrays and Hash tables.
  Automatic variables ($_, $Args etc)
  Preference variables Verbosity, Confirmations, ErrorAction, $Debug
  Ref vars  Pass a reference variable to a function.
  Environment variables ($Env:) & PowerShell providers.

Evaluate expressions

  Escape chars, delimiters, Here Strings and "quotes".
  Comparison  -like, -lt, -gt, -eq, -ne, -match
  DataTypes   PowerShell data types.
  Methods     ToUpper(), PadRight(), Split(), Substring(), Replace() etc.
  .Net Math   Round(), Ceiling(), Max(), Min()
  Operators   Format strings and arrays @( ) -f  [ ]  $( )  ::  &
  Concat      Several methods to combine strings together.
  Regular Expressions  Search and/or Replace.
  Replace     Basic Search/Replace in strings and files.
  Wildcards   Match multiple items.

Functions and Modules

  Scriptblock A collection of statements: { … }
  Functions and Filters Write a named block of code.
  Function Input Processing (Begin..Process..End)
  Advanced Functions a template to copy.
  Modules  Combine functions into a module for easy re-use.

Example scripts and functions

  Base36        Convert numbers to/from base 36.
  CD -          Jump to the previous working directory.
  Console Size  Set the PowerShell console window size.
  DelOlder      Delete files and folders older than n days.
  DisplayRes    Get the display resolution of multiple computers.
  Check-Backups Check multiple locations for files that have changed.
  Get-Bandwidth List the average IO for a Network interface.
  Get-DiskSpace List the free disk space for multiple computers.
  Get-OSVersion Get the OS and Service pack level of a remote machine (inventory).
  Get-Programs  List Installed Software (Add/Remove programs)
  Get-Uptime    Get the system Uptime for one or more computers.
  Logged On     Who is logged in / where is a user logged in.
  LastLogon     Find when an account last logged in.
  MsgBox        A function to display messages in a popup message box.
  Password expiry Reminder email.
  pshInfo       List Ram, Disk Space, Service pack, Uptime.
  psp           PowerShell Ping.
  Set-LastWrite Reset Folder Last Modified to the most recent file in the folder.
  ServiceStatus List installed services and service status.
  set-eol       Change the line endings (CR/LF) of a text file.
  StampMe       Rename a file with the current Date/Time.
  Touch         Change the date/time of a file/folder.
  Video Converter A simple GUI front end for the FFmpeg video converter (compress/resize).

Reference / How to

  Run a script  How to run a .ps1 script by calling PowerShell.exe
  Elevate       Run with elevated permissions (As Admin).
  Comments      How to comment your scripts.
  Circular      Find circular nested AD groups.
  Event IDs     The most common Windows Event IDs.
  Keyboard      Keyboard shortcuts.
  LDAP          Lightweight Directory Access Protocol (LDAP) queries.
  Open Here     Open PowerShell from any folder.
  PS verbs      Naming convention (Technet)
  $Profile      The PowerShell startup $Profile.
  Prompt        Configure the PowerShell prompt.
  PS Remoting   Run PowerShell on remote machines.
  #requires     Prevent a script from running without a required element.
  Template      Starting point for new PowerShell scripts.
  Verbs         Approved Verbs for PowerShell
  OS Version    How to retrieve the OS version in PowerShell.