PowerShell/Docs/FAQ.md

PowerShell FAQ

What is PowerShell?

PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language.

Why use PowerShell?

✔️ it's powerful: fully control your computer

✔️ it's cross-platform: available for Linux, Mac OS and Windows

✔️ it's open-source and free: see the Github repository at https://github.com/PowerShell/PowerShell

✔️ it's easy to learn: see the tutorial for beginners at https://www.guru99.com/powershell-tutorial.html

✔️ it's fully documented: see the PowerShell documentation at https://docs.microsoft.com/en-us/powershell/

How to get PowerShell?

• Windows 7 and newer provides PowerShell by default. However, script execution is disallowed by default (execution policy is "restricted"). To enable this, enter as administrator:

  PS> Set-ExecutionPolicy RemoteSigned
  

• On CentOS, Debian, Docker, Fedora, macOS, openSUSE, Red Hat, Ubuntu visit https://github.com/PowerShell/PowerShell for installation.
• On Linux supporting Snaps install PowerShell by executing:

  $ snap install PowerShell
  $ ln -s /snap/bin/pwsh /usr/bin/pwsh
  

How to get the PowerShell Scripts?

• Git users execute: $ git clone https://github.com/fleschutz/PowerShell
• otherwise download and unzip: https://github.com/fleschutz/PowerShell/archive/master.zip

Why do some scripts show gibberish characters?

Those PowerShell scripts are using Unicode characters. Use a modern console supporting UTF-8 such as Windows Terminal, please.

How to set PowerShell as default shell on Linux?

Make sure PowerShell is installed, then execute: chsh -s /usr/bin/pwsh <username>. In case you experience an "invalid shell" error, add "/usr/bin/pwsh" to /etc/shells.

How to add the scripts to the search path?

Want to use the PowerShell scripts everywhere on the command-line? Then you need to add the Scripts/ subfolder to the search path:

• On Linux using Bash: edit .profile in your home directory and add the line: PATH="$PATH:/path/to/PowerShell/Scripts"
• On Windows: open the environment variables dialogue and add the full path to Scripts/ to the system environment variable "Path"

How to use PowerShell in Windows context menus?

• to enable "right-click > New > Windows PowerShell Script" execute Add_ps1_to_New_context_menu.reg in subfolder Data/
• to disable this execute Remove_ps1_from_New_context_menu.reg in subfolder Data/

How to execute PowerShell scripts by voice?

1. Download and install Serenade from https://serenade.ai/.
2. Download and install the PowerShell Scripts, then set the search path to it.
3. Execute once: ./export-to-serenade.ps1 computer (this creates a custom JavaScript file at $HOME/.serenade/scripts/PowerShell.js using the wake word 'computer').
4. Launch Serenade and click the Pause button to enable Listening mode.
5. Launch Windows Terminal and click into the window.
6. Say: Computer, open calculator (this launches the calculator application by executing the PowerShell script open-calculator.ps1).

See the list of supported voice commands for more information.

Which editor to use for PowerShell scripts?

• PowerShell ISE (Integrated Scripting Environment) - Official PowerShell development environment included with Microsoft Windows.
• Visual Studio Code - Supporting syntax highlighting, on-the-fly problem checking and an integrated PowerShell Console (available for free on Linux, Mac OS and Windows).
• PowerShell Studio - Powerful PowerShell IDE with module, help, and user interface development tools, high DPI support and regular updates.
• PowerShell Plus - All in one IDE.
• Atom package - Add-on with PowerShell language support for Atom.
• SublimeText package - Add-on with PowerShell language support for Sublime Text.
• or simply use your favorite text editor

How to write good PowerShell scripts?

Good PowerShell scripts are user-friendly and platform-independant. As a guideline follow these rules, please:

1. the filename is named using the <verb>-<object>.ps1 scheme
2. the encoding is UTF-8-BOM to provide Unicode character support
3. the script has execute file permissions: chmod a+rx (for Linux support)
4. the script provides a comment-based help with synopsis, description, parameters, link, author, and license
5. check the requirements (e.g. #Requires -RunAsAdministrator, or #Requires -Version 3)
6. prefer command-line options, else ask the user for help
7. recommended is Set-StrictMode -Version Latest to enable additional error checking
8. for readibility use UpperCamelCase for variables and functions, lowerCamelCase for everything else
9. on error call write-error with keyword "ERROR:" (to support log parsers) and exit the error code (mostly 1)
10. on success exit with error code 0 (exit 0)

Want to contribute or found a bug or issue?

If you find something bad (like a bug, error, or any issue), please report it here by open an Issue.

Or even better: Fork the repository, add or fix the script and submit a pull request, so others can participate too.

Your question is not answered here?

Send your question to: markus [at] fleschutz [dot] de