Grep OR Using grep -e. Using grep -e option you can pass only one parameter. So you could either add an else clause if you want both "does" and "does not" prints, or you could just negate the if condition to only get failures. The above command will grep all files in /var/log/ directory, but both journal and httpd folders will exclude from the search. To see the names of the files that contain the search term, use the -l (files with match) option. To find out which C source code files contain references to the sl.h header file, use this command: grep -l "sl.h" *.c. for example files with 'ns1.biz.rr.com' need to be extracted to the directory above or some other directory. file1 The grep executed in the subshell $(), will print all filenames which contain stringA. A line in a text file is a sequence of characters until a line break is introduced. One other useful option when grep All Files in a Directory is to return all files which do not match the given text pattern. Find text with grep using case insensitive option. In this article we explore the myriad ways to search for text in files using PowerShell. Use multiple -e option in a single command to use multiple patterns for the or condition. To force grep to do it, you could run a whole-line, fixed-text, file-based exclusion in both directions: { grep -vxF -f list-1.txt list-2.txt; grep -vxF -f list-2.txt list-1.txt; } This asks grep for the lines in the 2nd file that do not exist in the 1st file, where we reverse the filenames for the 2nd grep. As long as your filenames do not contain spaces, tabs, newline or wildcard characters, and if your grep supports the -L option, you can do it as follows: $ cat file1 stringA stringC $ cat file2 stringA stringB $ grep -L stringB $(grep -l stringA file?) Files without match – Inverse Recursive Search in grep. I need to extract the files that contain a certain line of text to another directory. You can also use grep directly on files and exclude line matches based on words or syntax, like so: grep -v "ThisWord" example.txt You need to use the grep command.The grep command or egrep command searches the given input FILEs for lines containing a match or a text string. For example, grep either Tech or Sales from the employee.txt file. The file names are listed, not the matching lines. grep -e pattern1 -e pattern2 filename. grep "alpha" | grep -v "beta" I use this kind of construct all the time to winnow down excessive results from grep . Note: A line does not represent a line of text as viewed on the terminal screen. The output will be the example.txt text file but excluding any line that contains a string match with “ThisWord”. grep will return success if it finds at least one instance of the pattern and failure if it does not. To search for text using the case insensitive option, simply use the “-i” option. grep command syntax for finding a file containing a particular text string. The syntax is: grep "text string to search" directory-pathgrep [option] "text string to search" directory-pathgrep -r "text string to search "directory-path Exploring the Select-String Cmdlet Select-String (our PowerShell grep) works on lines of text and by default will looks for the first match in each line and then displays the file name, line number, and the text within the matched line. If you have an idea of which result set will be smaller, put that one first in the pipeline to get the best performance, as the second command only has to process the output from the first, and not … 4. And of course, we can look for files that don’t contain the search term. The output of grep commands may contain whole paragraphs unless the search options are refined. Use multiple -e option with grep for the multiple OR patterns. 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