![]() ![]() If you found this post interesting, I’ve also written up some examples of how to grep using Windows Powershell here. type f -exec grep -n "text_to_find" \ -print If you have filenames with spaces in them, the commands above will not work properly, another alternative is:įind. ![]() type f -print | xargs file | grep -i text | cut -d ':' -f 1 | xargs grep text_to_find If you don’t know what file type to narrow the search by, you make use of the “ file” command to restrict the search to text files only:įind. name '*.c' | xargs grep -n "text_to_find" You can narrow down the selection criteria:įind. The above command is fine if you don’t have many files to search though, but it will search all files types, including binaries, so may be very slow. If you do not have GNU grep on your Unix system, you can still grep recursively, by combining the find command with grep: ![]() But older releases of Unix do not have GNU grep and do not have any option to grep recursively. This is all very easy because Linux includes GNU grep. To search within particular file types:.Note line numbers are added with -n option I always like to use grep -rn because it shows the line number also:.You could easily replace that with “/etc” for example: The dot simply means start the search from the current working directory.“text_to_find” is the string to search for.If more than one match was found, then each line number will be appended to the filename.If you’re using Linux, performing a recursive grep is very easy. Demos/snippets/multiComptSigNeur.py:268Īnd voila, it generates the path of matched files and line number at which the match was found. python/moose/multiscale/core/mumbl.py:206 Only those files which matches this regular expression will be considered.įor example, if I want to search Python files with the extension py containing Pool( followed by word Adaptor, I do the following. This is another regular expression which works on a filename. The third argument, file_pattern, is optional. We use the regular expression format defined in the Python re library. The second argument, pattern_to_search, is a regular expression which we want to search in a file. The first argument, path, is the directory in which we will search recursively. This is how one should use this script./sniff.py path pattern_to_search I wrote a Python script which does something similar. -r is for recursive -e is optional but its argument specifies the regex to search for. -print0 and -null on the other side of the | (pipe) are the crucial ones, passing the filename from the find to the grep embedded in the xargs, allowing for the passing of filenames WITH spaces in the filenames, allowing grep to treat the path and filename as one string, and not break it up on each space.-type f specifies that you are looking for files.( -name " *.pas" -o -name " *.dfm" ) : Only the *.pas OR *.dfm files, OR specified with -o in the find specifies from the current directory. type f \( -name "*.pas" -o -name "*.dfm" \) -print0 | xargs -null grep -with-filename -line-number -no-messages -color -ignore-case "searchtext" type f -name "*.*" -print0 | xargs -null grep -with-filename -line-number -no-messages -color -ignore-case "searthtext"Īnd if you have an idea what the file type is you can narrow your search down by specifying file type extensions to search for, in this case. "/home" depending where you actually want to search.Įxpanding the grep a bit to give more information in the output, for example, to get the line number in the file where the text is can be done as follows: find. So in the examples above, you'd better replace ' /' by a sub-directory name, e.g. ![]() Warning: unless you really can't avoid it, don't search from '/' (the root directory) to avoid a long and inefficient search! Note: You can add 2>/dev/null to these commands as well, to hide many error messages. The Silver Searcher: ag 'text-to-find-here' / -l If you want to combine find with grep to limit the types of files searched you should use it like this (this example will limit the search to files ending. RipGrep - fastest search tool around: rg 'text-to-find-here' / -l will recursively find all occurrences of registerlongarrays in your current directory. Better try them, provided they're available on your platform, of course: Faster and easier alternatives The find command is often combined with xargs, by the way.įaster and easier tools exist for the same purpose - see below. \ 2>/dev/nullįind is the standard tool for searching files - combined with grep when looking for specific text - on Unix-like platforms. This will only search through those files which have.
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