Deleting entire lines in a text file based on a partial string match with Windows PowerShell

Posted by Charles on Super User See other posts from Super User or by Charles
Published on 2010-03-08T21:24:26Z Indexed on 2010/03/08 21:38 UTC
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windows-7

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powershell

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lines

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script

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text

So I have several large text files I need to sort through, and remove all occurrences of lines which contain a given keyword. So basically, if I have these lines:

This is not a test This is a test Maybe a test Definitely not a test

And I run the script with 'not', I need to entirely delete lines 1 and 4.

I've been trying with:

PS C:\Users\Admin> (Get-Content "D:\Logs\co2.txt") | Foreach-Object {$_ -replace "3*Program*", ""} | Set-Content "D:\Logs\co2.txt"

but it only replaces the 'Program' and not the entire line.

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