The following example shows how to search through all the files in the current directory for lines that do not contain the letter e. To search for all the lines of a file that do not contain a certain string, use the -v option to grep. Searching for Lines Without a Certain String When it finds a pattern that matches in more than one file, it prints the name of the file, followed by a colon, then the line matching the pattern.Īlaska:Alaska is the largest state in the United States. The grep command can search for a string in groups of files. To find a pattern that is more than one word long, enclose the string with single or double quotation marks. The search provides the following results. The second part of the command line pipes that list through grep, looking for the pattern Sep. The first part of this command line produces a list of files ending in. ps” and were created in the month of September. The following example displays files that end in “. To use grep as a filter, you must pipe the output of the command through grep. You can use the grep command as a filter with other commands, enabling you to filter out unnecessary information from the command output. Note that grep failed in the first try because none of the entries began with a lowercase a. Grep is case sensitive that is, you must match the pattern with respect to uppercase and lowercase letters: Note that more than one line might match the pattern you give. $ grep Poe extensions Edgar Allan Poe x72836 Strings can include blank spaces, punctuation, and invisible (control) characters.įor example, to find Edgar Allan Poe's telephone extension, type grep, all or part of his name, and the file containing the information: A single letter is a string, as is a word or a sentence. In this example, string is the word or phrase you want to find, and file is the file to be searched.Ī string is one or more characters. For more information on the Linux find command, here’s a link to my Linux ‘find’ command examples article.To search for a particular character string in a file, use the grep command. I hope this quick tip on finding Unix and Linux files and directories that don't match a filename pattern (not matching a pattern) has been helpful. Summary: How to find files that don’t match a filename pattern type f -not -name "*.html" -exec ls -l \ Here’s how to run a simple Unix ls command on them:įind. Of course it’s usually not enough to find files not matching a filename pattern usually you want to do something with them. Find files not matching a filename pattern and doing something with them html file extension (filename pattern).Īlso, if you’re not familiar with it, the -f argument in that find command means “just look for files,” and don’t return search results for directories. This Linux find command using the “not” operator creates a list of all files not ending with the. Fortunately with the newer Unix/Linux find syntax this solution is pretty easy, you just include the -not argument, like this: In my case I just ran into a situation where I needed to find all files below the current subdirectory that are NOT named with the filename pattern *.html. Unix/Linux find command “patterns” FAQ: How do I find files or directories that don’t match a specific pattern (files not matching a regex pattern, or filename pattern)?
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |