#LINUX GREP EXCLUDE PATTERN HOW TO#

You’ve already gone through the details of how to exclude in grep. grep to ignore patterns Ask Question Asked 9 years, 4 months ago Modified 5 years, 5 months ago Viewed 65k times 15 I am extracting URLs from a website using cURL as below. If you want to exclude some patterns when grep, you can use the -v option. To exclude multiple directories at once, put directories in curly braces and separate by commas with no spaces.įor example, I want to exclude files that contain the string Linux inside the ubuntu and food directory: $ grep -r -exclude-dir= linux /

So the question is how to prevent grep fnord from showing up as a running process because obviously Im not interested in that one. This is also the biggest difference between -r and -R options.įor example, I want to exclude files that contain the string cat inside the /home/ubuntu directory: $ grep -R -exclude-dir=ubuntu cat /home at 17:10 4 acolyte, thats precisely it - but because its piping the output into grep, grep is running (waiting for the output of ps aux, I expect). To exclude a directory that you specified, use the –exclude-dir with -R or -r option. For example, I want to exclude the word function that appears at the beginning of a line $ grep -v '^function' fn.txtīecause the word function appears at the ending of the line, it won’ be excluded. If you only want to exclude words that show at the beginning of a line. If you want to specify multiple strings at once, let’s use the -e option.įor example, I want to exclude limit and abcd string: $ grep -v -e limit -e abcd fn.txt If the string that you wanna search contains space, you must use parentheses or quotes.įor example, I want to exclude the line that contains string ab cd: $ grep -v 'ab cd' fn.txt Now I have a file named fn.txt.that contains the following contents:įor example, I want to exclude the line that contains the word function: $ grep -v function fn.txtĪs you can see, the line that contains the word function is filtered out. To display lines that don’t match the search pattern, let’s use the -v option. Similarly, by using grep -v you can list down all files which dont contain a word I mean excluding files which match a pattern, grep -c will print the. 114 I would like to run ls and exclude certain files in the output.

exclude-fromFILE files that match PATTERN in FILE will be skipped. Excluding multiple patterns with one grep command Ask Question Asked 7 years, 7 months ago Modified 5 years, 4 months ago Viewed 34k times 9 I was wondering if there is a best way to run the following command cat grep -v '90.192.142. And it is also very important to exclude words and patterns or dictionaries and files.īelow is the guide on how to exclude in grep as we go through below. Example: grep -i hello world menu.h main. The grep command is used to filter out input files that match a regular expression then print to standard output. Grep stands for “global regular expression print” and it is a useful command in Linux.

Linux grep exclude pattern