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moving to powershell from dos batch - tutorial / starter advice?

In an other question about stepping through a dos batch file, an expert said

Nowadays you should take the leap to switch to PowerShell.

Got me thinking - I've been making dos batch files since DOS, so I guess I should learn a new skill?

anyone got tips on how to start?  
Is being able to run power shell native to win 7?  XP?  I thought there was something you had to install to get PS to run on a PC? Or maybe just for XP?

What's the extension?

This would empty the windows temp folder, what would it look like as a powershell script?  ANd to run that, you just double click on the file?

Rem Clean windows temp folder
set folder=%windir%\temp
for /f "delims=" %%a in ('dir/ad/b %folder%\*') do (rd /s /q "%folder%\%%a")
del %folder%\*.* /q

 Thanks!
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BeGentleWithMe-INeedHelp
Asked:
BeGentleWithMe-INeedHelp
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3 Solutions
 
Dan CraciunIT ConsultantCommented:
>>Is being able to run power shell native to win 7? yes, v2. You can get v3 with WinRM

>>XP, no, but you can install WinRM

>>What's the extension? ps1

>>you just double click on the file? not by default. double click will open the file for editing.

$folder=$env:windir + "\temp"
gci $folder -Recurse | %{Remove-Item $_.Fullname -Force}

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HTH,
Dan
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QlemoDeveloperCommented:
Or, much more simple, just
remove-item -recurse $env:Windir\Temp\*

Open in new window

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QlemoDeveloperCommented:
In regard of some resources:
I recommend to read the EE articles in the PowerShell TA to get an idea how it works.
Make intense use of get-help -detailed for cmdlets you need to know something about.
Get a list of commands which might apply by using e.g. get-command *item*.
Have a look at blogs.technet.com/b/heyscriptingguy/ for some simple, real-life code snippets with explanation.
Subscribe to questions posted in PowerShell here.
And, of course, there is a lot of more out there.
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