Powershell grep files for string12/30/2023 ![]() md files in the current directory and all sub-directories, and print any lines that contain the word “hello”. md files in the current directory and all sub-directories: grep -rI -include="*.txt" -include="*.md" "hello". To do this, you can use the -I or -binary-files=without-match option to exclude binary files, and the -include option to specify the file types you want to include.įor example, to search for the word “hello” within all. ![]() Sometimes you may only want to search within certain file types, rather than all text files. txt files in the current directory and all sub-directories, and print any lines that contain the exact word “hello”. However, if you want to search for an exact match, you can use the -w or -word-regexp option.įor example, to search for the exact word “hello” within all text files in the current directory and all sub-directories: grep -rw "hello" *.txt Search for an Exact Matchīy default, grep searches for patterns that match the given search term. txt files in the current directory and all sub-directories, and print any lines that contain the word “hello”. Here’s an example of how to use grep to search for the word “hello” within all text files in the current directory and all sub-directories: grep -r "hello" *.txt This tells grep to search through all sub-directories as well as the current directory. To search through files recursively, you’ll need to use the -r or -recursive option with grep. In this blog post, we’ll take a look at how to grep files recursively, including how to search through sub-directories, how to search for an exact match, how to only search within certain file extensions, and how to use the find command instead of grep. One common use case for grep is the need to search through multiple files, including files within sub-directories. In this article you will learn how to grep files recursively. It’s a staple of many Linux and Unix-based systems, and is widely used by system administrators, developers, and others who need to search through large volumes of text data. I'm ok with rewriting my approach from line 1 if I can get it done before I go home for the weekend.Grep is a powerful command-line tool that allows you to search for specific patterns within text files. It's already been running for half an hour. I might be able to break out of the while if the if becomes true but I am still going to make so many comparisons I'm not sure if optimizing that will actually do any good. It's all in memory so at least I don't have disk I/O slowing me down. I'm up for using any tool to speed this up because right now there's 550991 lines in all the log files combined and there's 1830 filenames so this approach is making 1,008,313,530 comparisons. I suppose I could build a large regex of the 1830 files or'd together and run that once against the logs, but is that feasible? The regex would be almost 30KB (1830 files * average length of file name of about 16 chars = 29280 bytes not to mention another 1830 bytes of pipe symbols).Įdit: Here's what I'm doing now when I'm in the logs folder and the list is one folder back: $logs = gc * ![]() I have 1830 files in the list so if I have to start fresh with each one, I'll end up reading 46 MB so many times that I'll be dealing with GBs of repeating data. I'm using GnuWin32 on windows so I could couple this with Powershell but I think doing that would require that one filename greps all 46 MB and when I move to the next filename I start over. I'll probably use -A and -B to get a little context out of the log files when a name is found. I know I can cat * all the log files and pipe it to grep. It does contain file names and paths as well as what was done to it. The logs do seem to have a structure, but I'm not entirely familiar with that structure yet. The list is structured as one file per line without file extension. ![]() How could I grep these log files for any value in my list? I also have a folder full of 41 log files adding up to 46 MB that hopefully have log entries pertaining to the missing files. I have a list of files that have gone missing somewhere in our system at work.
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