![]() ![]() So we have taken a quick look at the basic usage of the cmdlet, now let’s dive a bit deeper into all the possibilities of the search-string cmdlet in PowerShell. The advantage of PowerShell is that we can easily format the output to a more readable format. \log\*.logīy default, the output of the select-string cmdlet will show the filename, line number, and the complete line where the string was found: Powershell Grep Equivalent The grep equivalent would be: grep "error". Select-String "error" "C:\temp\log\*.log" Select-String -Pattern "error" -Path "C:\temp\log\*.log" To search for a particular string in log files we can use the following cmdlet in PowerShell: # Search for the string error in the path Make sure you read through the end for a nice little bonus tip! Finding a String with PowerShell Select-Stringīefore we dive into all the possibilities of the select-string cmdlet, let’s first take a look at a couple of common examples. We are going to take a look at different examples that you can use to find a string with PowerShell. In this article, we are going to take a look at the PowerShell grep equivalent Select-String. PowerShell Select-String Multiple Patterns.Return only the matched string with Raw.Showing lines before and after with Context.Finding a String with PowerShell Select-String.(bearing in mind that case-insensitive matching is often locale-dependent for instance, whether uppercase i is I or İ may depend on the locale according to grep -i i). The standard equivalent of that would look like: grep -e abc -e '' (and equivalent variants with other regexp syntaxes). Where it could be more interesting would be for instance if you want abc matching to be case sensitive and uyx not, which you could do with: grep -P 'abc|(?i)uyx' Those don't really bring much advantage over the standard -i option. Grep '\(?i\)abc|uyx' # ast-open grep only which makes it non-POSIX-compliant Grep -E '(?i)abc|uyx' # ast-open grep only Grep -K '~(i)abc|uyx' # ast-open grep only ![]() grep -P '(?i)abc|uyx' # wherever -P / -perl-regexp / -X perl is supported The (s and )s, like | also need to be quoted for them to be passed literally to grep as they are special characters in the syntax of the shell language.Ĭase insensitive matching can also be enabled as part of the regexp syntax with some grep implementations (not standardly). You can add (.)s around abc|uyx ( \(.\) for BREs), but that's not necessary. ![]() # can make it explicit with -G, -basic-regexp or # default but with some grep implementations, you Grep -i 'abc\|uyx' # with the \| extension to basic regexps supported by Grep -i -K 'abc|uyx' # ksh regexps (with ast-open grep) also with Grep -i -X 'abc|uyx' # augmented regexps (with ast-open grep) also with With some grep implementations, you can also do: grep -i -P 'abc|uyx' # perl-like regexps, sometimes also with Many options with grep alone, starting with the standard ones: grep -i -e abc -e uyx ![]()
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