Get-Help for documentation in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the <code>Get-Help</code> cmdlet in PowerShell?

Get-Help shows information about PowerShell commands and how to use them. It helps you learn what a command does and what options it has.

beginner

How do you get a detailed explanation of a command using Get-Help?

Use Get-Help CommandName -Detailed. This shows more information than the basic help, including examples and parameters.

beginner

What does Get-Help CommandName -Examples do?

It shows only examples of how to use the command. This helps you see real use cases quickly.

intermediate

How can you update the help files on your system to get the latest documentation?

Run Update-Help in PowerShell. This downloads the newest help files from the internet.

intermediate

What is the difference between Get-Help CommandName and Get-Help CommandName -Full?

Get-Help CommandName shows basic help. -Full shows all details including syntax, parameters, inputs, outputs, and examples.

Which command shows only examples for a PowerShell cmdlet?

A Get-Help CommandName -Examples

B Get-Help CommandName -Detailed

C Get-Help CommandName -Full

D Update-Help

-Examples shows just examples for the command.

How do you get the most complete help information for a command?

A Update-Help

B Get-Help CommandName -Examples

C Get-Help CommandName -Full

D Get-Help CommandName -Brief

-Full shows the most detailed help including syntax and parameters.

What does the Update-Help cmdlet do?

A Shows examples of commands

B Deletes old help files

C Runs a command with admin rights

D Downloads the latest help files

Update-Help downloads the newest help documentation from the internet.

If you want a quick summary of a command, which Get-Help option should you use?

A -Examples

B No option (just Get-Help CommandName)

C -Detailed

D -Full

Running Get-Help CommandName without options gives a quick summary.

Which of these is NOT a valid Get-Help parameter?

A -Run

B -Full

C -Examples

D -Detailed

-Run is not a valid parameter for Get-Help.

Explain how to use Get-Help to learn about a new PowerShell command.

Think about how you find instructions for a new tool.

Describe the difference between Get-Help CommandName and Get-Help CommandName -Full.

One is short and one is very detailed.

Practice

1. What is the main purpose of the Get-Help command in PowerShell?

easy

A. To show documentation and usage information for PowerShell commands

B. To update PowerShell to the latest version

C. To execute scripts automatically

D. To list all running processes on the system

Solution

1. Step 1: Understand the role of Get-Help

   Get-Help is designed to provide users with documentation and usage details about PowerShell commands.

2. Step 2: Compare options

   Options A, B, and C describe other unrelated tasks like updating PowerShell, running scripts, or listing processes, which are not the purpose of Get-Help.

3. Final Answer:

   To show documentation and usage information for PowerShell commands -> Option A

4. Quick Check:

   Get-Help = Documentation [OK]

Hint: Get-Help always shows command usage info [OK]

Common Mistakes:

• Confusing Get-Help with Update-Help
• Thinking Get-Help runs commands
• Assuming Get-Help lists system info

2. Which of the following is the correct syntax to see detailed examples for the Get-Process command using Get-Help?

easy

A. Get-Help -Examples Get-Process

B. Get-Help Get-Process /Examples

C. Get-Help Get-Process -Examples

D. Get-Help Get-Process --examples

Solution

1. Step 1: Recall correct parameter placement

   In PowerShell, parameters come after the command name, so Get-Help Get-Process -Examples is correct.

2. Step 2: Identify invalid syntax

   Options A, C, and D use incorrect parameter placement or invalid syntax like slashes or double dashes, which PowerShell does not use.

3. Final Answer:

   Get-Help Get-Process -Examples -> Option C

4. Quick Check:

   Correct syntax = Get-Help Get-Process -Examples [OK]

Hint: Parameters follow command name in Get-Help [OK]

Common Mistakes:

• Using slashes instead of dashes for parameters
• Placing parameters before the command name
• Using double dashes like in Linux

3. What will be the output of the following command?

Get-Help Get-Item -Full

medium

A. A brief summary of the Get-Item command

B. Detailed help including syntax, parameters, examples, and descriptions

C. Only examples of how to use Get-Item

D. An error saying the parameter -Full is invalid

Solution

1. Step 1: Understand the -Full parameter

   The -Full option with Get-Help shows the complete detailed help including syntax, parameters, examples, and descriptions.

2. Step 2: Compare output options

   A brief summary of the Get-Item command is too brief, C shows only examples, and D is incorrect because -Full is a valid parameter.

3. Final Answer:

   Detailed help including syntax, parameters, examples, and descriptions -> Option B

4. Quick Check:

   -Full = Detailed help [OK]

Hint: -Full shows all details in Get-Help [OK]

Common Mistakes:

• Thinking -Full shows only examples
• Assuming -Full is invalid
• Expecting brief output with -Full

4. You run Get-Help Get-Service -Examples but get no output. What is the most likely reason?

medium

A. The -Examples parameter is not valid for Get-Help

B. The command Get-Service does not exist

C. You need to run PowerShell as administrator

D. The help files are not updated on your system

Solution

1. Step 1: Check command existence

   Get-Service is a standard PowerShell command, so it exists and is valid.

2. Step 2: Understand help file updates

   If help files are outdated or missing, Get-Help may show no output for examples. Running Update-Help fixes this.

3. Step 3: Validate parameters and permissions

   -Examples is valid, and running as admin is not required to view help.

4. Final Answer:

   The help files are not updated on your system -> Option D

5. Quick Check:

   No output = Update-Help needed [OK]

Hint: No output? Run Update-Help to refresh docs [OK]

Common Mistakes:

• Assuming command does not exist
• Thinking -Examples is invalid
• Believing admin rights are required

5. You want to create a script that always shows the full help for any command entered by the user. Which PowerShell command snippet correctly achieves this?

hard

A. $cmd = Read-Host 'Enter command'; Get-Help $cmd -Full

B. Get-Help Read-Host -Full

C. Read-Host 'Enter command'; Get-Help $_ -Full

D. Get-Help -Full Read-Host

Solution

1. Step 1: Capture user input correctly

   Read-Host stores input in a variable, so $cmd = Read-Host 'Enter command' captures the command name.

2. Step 2: Use variable in Get-Help

   Passing $cmd to Get-Help with -Full shows detailed help for the entered command.

3. Step 3: Identify incorrect options

   Read-Host 'Enter command'; Get-Help $_ -Full uses $_ which is not set here; B and D show help for Read-Host, not user input.

4. Final Answer:

   $cmd = Read-Host 'Enter command'; Get-Help $cmd -Full -> Option A

5. Quick Check:

   Store input then Get-Help $cmd -Full [OK]

Hint: Store input in variable, then use Get-Help with -Full [OK]

Common Mistakes:

• Using $_ without a pipeline
• Calling Get-Help on fixed command instead of input
• Placing parameters incorrectly