Updated patterns will be saved to file2_updated. E to support extended regex on BSD sed, you may need to replace -E with -r based on your system's sed See the -F (fixed string, as opposed to regular expression) and -x (exact: match the whole line) options. and add ^ and $ at the beginning and end of the pattern file you already have. Run the below command from commandline grep -i -color -f file2 file1 w, -word-regexp Select only those lines containing. Just create a normal file named file2 and paste the above content into it. Now with grep we have an argument ( -w ) which is used to grep for exact match of whole word from a file. An empty string as search expression matches all lines. Patterns are lists of one or more search expressions separated by newline characters. Just create a normal file named file1 and paste the above content into it. DESCRIPTION Look for specified patterns in the tracked files in the work tree, blobs registered in the index file, or blobs in given tree objects. we need to escape that with a backslash \ has special meaning in regex to match exactly. W identifies a term that is not a word comprised of any grouping of alphabetic, numeric, or underscore characters. The test is that the matching substring must either be at the beginning of the line, or preceded by a non-word constituent character. Select only those lines containing matches that form whole words. To match exactly MSTRG.18691.1 you can add ^ & $ at both ends and remove the word boundaries, additionally. From (GNU) grep(1) man page:-w, -word-regexp. Example code: awk '$2="FallenHope"' DATABASE1.txtĪwk -F : '$1="FallenHope"' DATABASE2.You can use start with ^ and end with $ operator to match start with and begin with. The tool is designed to work with fields, this approach seems perfect for the job. If there are quirks I didn't anticipate and you know them, adjust the pattern accordingly. You may prefer "one or more" better than "zero or more" but if the format is strict then "zero or more" should be fine.Īnyway you need to adjust the pattern to the format. grep -w 1.2.3.4 testfile.csv 1.2.3.4,Jim,Jonson,000000 1.2.3.4.5,George,Doe,FFFFF How can I make it match exactly and only the specific word In this example only 1.2.3.4. It searches for zero or more digits at the beginning of the line, followed by zero or more blanks, followed by FallenHope, followed by a blank. Something like this should work: grep '^]*]*FallenHope]' DATABASE1.txt grep '^FallenHope:' DATABASE2.sqlĪdd redirection ( > breached.txt) after you make sure my code does what you want.Īnd for the first format 1 USERNAME hashedpass Trailing : in the pattern makes matching FallenHope-1 or FallenHopes impossible. following grep will search for FallenHope at the very beginning of the line. You need to tailor the grep pattern to fit each format separately. FallenHope-12345 does match (and -w doesn't help because - is a non-word constituent character).e-mail address does match (and -w doesn't help because is a non-word constituent character). There's no guarantee the matching is against the USERNAME field. There are at least two problems with your approach based on grep FallenHope or grep -w FallenHope: Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Word constituent characters are letters, digits, and the underscore. matches0 will contain the text that matched the full pattern, matches1 will have the. x, -line-regexp Select only those matches that exactly match the whole line. I believe the -x flag is what you are looking for. Similarly, it must be either at the end of the line or followed by a non-word constituent character. If matches is provided, then it is filled with the results of search. 1 In that case, I'd use grep -q 'user1example\.com\>' - with a line anchor at the start, and an end-of-word anchor at the end. The man pages for grep will show you the light. This is what man 1 grep says about grep -w:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |