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docs/learning-powerShell/powershell-beginners-guide.md
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PowerShell Beginners Guide
====
If you are new to PowerShell, this document will walk you through a few examples to give you some basic ideas of PowerShell. We recommend that you open a PowerShell console/session and type along with the instructions in this document to get most out of this exercise.
If you are new to PowerShell, this document will walk you through a few examples to give you some basic ideas of PowerShell.
We recommend that you open a PowerShell console/session and type along with the instructions in this document to get most out of this exercise.
Launch PowerShell Console/Session
@ -19,7 +20,8 @@ In this section, you will learn how to
- exit a PowerShell session
- and more
As mentioned above, PowerShell commands is designed to have Verb-Noun structure, for instance Get-Process, Set-Location, Clear-Host, etc. Let’s exercise some of the basic PowerShell commands, also known as **cmdlets**.
As mentioned above, PowerShell commands is designed to have Verb-Noun structure, for instance Get-Process, Set-Location, Clear-Host, etc.
Let’s exercise some of the basic PowerShell commands, also known as **cmdlets**.
Please note that we will use the PowerShell prompt sign **PS />** as it appears on Linux in the following examples.
It is shown as **PS C:\\>** on Windows.
@ -39,7 +41,8 @@ Handles NPM(K) PM(K) WS(K) CPU(s) Id ProcessName
…
```
Only interested in the instance of firefox process that are running on your computer? Try this:
Only interested in the instance of firefox process that are running on your computer?
Try this:
```PowerShell
PS /> Get-Process -Name firefox
@ -48,7 +51,9 @@ Handles NPM(K) PM(K) WS(K) CPU(s) Id ProcessName
- - - 74 403.150 1209 firefox
```
Want to get back more than one process? Then just specify process names, separating with commas. For example,
Want to get back more than one process?
Then just specify process names, separating with commas.
For example,
```PowerShell
PS /> Get-Process -Name firefox, powershell
Handles NPM(K) PM(K) WS(K) CPU(s) Id ProcessName
@ -63,7 +68,8 @@ Handles NPM(K) PM(K) WS(K) CPU(s) Id ProcessName
PS /> Get-Process
PS /> Clear-Host
```
Type too much just for clearing the screen? Here is how the alias can help.
Type too much just for clearing the screen?
Here is how the alias can help.
**3. Get-Alias**: Improves the user experience by using the Cmdlet aliases
@ -85,7 +91,8 @@ Alias ri -> Remove-Item
Alias type -> Get-Content
…
As you can see "cls" is an alias of Clear-Host. Now try it:
As you can see "cls" is an alias of Clear-Host.
Now try it:
PS /> Get-Process
PS /> cls
@ -126,7 +133,9 @@ Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 7/7/2016 7:17 PM 0 test.ps1
```
You can use the **-Value** parameter to add some data to your file. For example, the following command adds the phrase "Write-Host 'Hello There'" as a file content to the test.ps1. Because the test.ps1 file exists already, we use **-Force** parameter to replace the existing content.
You can use the **-Value** parameter to add some data to your file.
For example, the following command adds the phrase "Write-Host 'Hello There'" as a file content to the test.ps1.
Because the test.ps1 file exists already, we use **-Force** parameter to replace the existing content.
```PowerShell
PS /home/jen> New-Item -Path ./test.ps1 -Value "Write-Host 'hello there'" -Force
@ -139,7 +148,8 @@ Mode LastWriteTime Length Name
-a---- 7/7/2016 7:19 PM 24 test.ps1
```
There are other ways to add some data to a file. For example, you can use Set-Content to set the file contents:
There are other ways to add some data to a file.
For example, you can use Set-Content to set the file contents:
```PowerShell
PS /home/jen>Set-Content -Path ./test.ps1 -Value "Write-Host 'hello there again!'"
@ -172,8 +182,8 @@ PS /home/jen> Remove-Item ./test.ps1
**9. $PSVersionTable**: displays the version of PowerShell you are currently using
Type **$PSVersionTable** in your PowerShell session, you will see something like below. "PSVersion" indicates the
PowerShell version that you are using.
Type **$PSVersionTable** in your PowerShell session, you will see something like below.
"PSVersion" indicates the PowerShell version that you are using.
```PowerShell
Name Value
@ -196,7 +206,8 @@ PS /home/jen> exit
Need Help?
----
The most important command in PowerShell is possibly the Get-Help, which allows you to quickly learn PowerShell without having to surf around the Internet. The Get-Help cmdlet also shows you how PowerShell commands work with examples.
The most important command in PowerShell is possibly the Get-Help, which allows you to quickly learn PowerShell without having to surf around the Internet.
The Get-Help cmdlet also shows you how PowerShell commands work with examples.
PS />**Get-Help -Name Get-Process**
@ -232,7 +243,8 @@ PS /> **Get-Help Get-Process -Example**
PowerShell Pipeline '|'
----
Sometimes when you run Get-ChildItem or "dir", you want to get a list of files in a descending order. To achieve that, type:
Sometimes when you run Get-ChildItem or "dir", you want to get a list of files in a descending order.
To achieve that, type:
```PowerShell
PS /home/jen> dir | sort -Descending
```
@ -254,7 +266,8 @@ How to Create and Run PowerShell scripts
- You can use ISE, VS Code or your favorite editor to create a PowerShell script and save the script with a .ps1 file extension (for example, helloworld.ps1)
- To run the script, cd to your current folder and type ./yourscript.ps1 (for example, ./helloworld.ps1).
Note: if you are using Windows, make sure you set the PowerShell's execution policy to "RemoteSigned" in this case. See [Running PowerShell Scripts Is as Easy as 1-2-3] [run-ps] for more details.
Note: if you are using Windows, make sure you set the PowerShell's execution policy to "RemoteSigned" in this case.
See [Running PowerShell Scripts Is as Easy as 1-2-3] [run-ps] for more details.
[run-ps]:http://windowsitpro.com/powershell/running-powershell-scripts-easy-1-2-3