CODEWITHSUNDEEP
powershell
Spina97
Spina97

Reputation: 199

Get a line number on Powershell?

So I have been searching a lot and couldn't find anything that wouldn't return me nothing.

I have a code with a variable and I have a file with a lot of lines on it. For example, I have the following file (things.txt):

Ketchup

Mustard

Pumpkin

Mustard

Ketchup

And what I want to take out is the line numbers of "Mustard". Here's the code I'm trying right now

$search="Mustard"
$linenumber=Get-Content things.txt | select-string $search -context 0,1
$linenumber.context

But it actually returns "". Everyone online was about using context but I only want to know the line number of every "Mustard" which are 2 and 4.

Thanks for your help!

Upvotes: 7

Views: 55273

Answers (4)

Tore Aurstad
Tore Aurstad

Reputation: 3826

Let me give a practical example of usage.

Here is an example together with Docker logs. I have running a Docker container with container id starting with 42. I want to see why the Docker container fails at start. It tries to connect to Mongoose DB and container fails. I redirect the output and I use select-string to achieve this.

First I run this command :

docker logs 42 2>&1 | select-string -pattern "Error" | select LineNumber,Line

This then gives me both the LineNumber and the Line, so I can see where in the output I have the pattern with text "Error".

You can use this on similar streams such as strings and files that are string based in Powershell.

Upvotes: 0

Zaheer
Zaheer

Reputation: 231

For people who are searching for one liner, code is self explanatory.

Get-Content .\myTextFile.txt | Select-String -Pattern "IamSearching" | Select-Object LineNumber

Edit(April 2022):

OR

(Select-String .\myTextFile.txt -Pattern "IamSearching").LineNumber

Upvotes: 5

denko
denko

Reputation: 1

Try insert -Path after Get-Content

Upvotes: -2

boxdog
boxdog

Reputation: 8442

Select-String returns the line number for you. You're just looking at the wrong property. Change your code to:

$search="Mustard"
$linenumber= Get-Content thing.txt | select-string $search
$linenumber.LineNumber

Upvotes: 18

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