[PowerShell] How to search for rows like Linux grep (Windows)

Introduction

I will write about how to grep like Linux in PowerShell on Windows.

What is grep in the first place?

Simply put, it's a command that searches a line in a Linux file. Please see the following page for details.

Detailed summary of grep command [Linux command collection]

Example of use

[root@tspweb01 network-scripts]# grep IPADDR ifcfg-enp0s8
IPADDR=192.168.56.30
[root@tspweb01 network-scripts]# 

** * State before command execution **

Before command execution

[root@tspweb01 network-scripts]# cat ifcfg-enp0s8
TYPE="Ethernet"
BOOTPROTO="none"
IPV6INIT="no"
NAME="enp0s8"
UUID="81d71b89-d1b6-4ca9-853d-c5bf74c8487e"
DEVICE="enp0s8"
ONBOOT="yes"
IPADDR=192.168.56.30
PREFIX=24
[root@tspweb01 network-scripts]# 

PowerShell grep method

Execution command

command

 <command> | Out-String -Stream | Select-String <The character string you want to search> 

Usage example ①

Extract the "Domain" line from the execution result of ** Get-NetFirewallProfile **

Before character string extraction

 PS C:\Users\Administrator> Get-NetFirewallProfile 

Name                            : Domain
Enabled                         : False
DefaultInboundAction            : NotConfigured
DefaultOutboundAction           : NotConfigured
AllowInboundRules               : NotConfigured
AllowLocalFirewallRules         : NotConfigured
AllowLocalIPsecRules            : NotConfigured
AllowUserApps                   : NotConfigured
AllowUserPorts                  : NotConfigured
AllowUnicastResponseToMulticast : NotConfigured
NotifyOnListen                  : False
EnableStealthModeForIPsec       : NotConfigured
LogFileName                     : %systemroot%\system32\LogFiles\Firewall\pfirewall.log
LogMaxSizeKilobytes             : 4096
LogAllowed                      : False
LogBlocked                      : False
LogIgnored                      : NotConfigured
DisabledInterfaceAliases        : {NotConfigured}

~~~abridgement~~~

PS C:\Users\Administrator>  

** Character string extraction result **

Before character string extraction

PS C:\Users\Administrator> Get-NetFirewallProfile | Out-String -Stream | Select-String Domain

Name                            : Domain

PS C:\Users\Administrator>  

Usage example ②

Extract the "test" line from ** test.txt **

Before character string extraction

 PS C:\Users\Administrator\Desktop> cat .\test.txt
aaaa

aaaa
test


vagfafa

fafeaea

iiaaaa

faejfajefa

** Character string extraction result **

Character string extraction result

PS C:\Users\Administrator\Desktop> cat .\test.txt | Out-String -Stream | Select-String "test"

test

PS C:\Users\Administrator\Desktop>  

Summary

You can search for a line with the following command.

command

 <command> | Out-String -Stream | Select-String <The character string you want to search>