If you have any questions or suggestion, feel free to leave a comment below. You can get more information about Grep at Grep Manual page. The grep command is regularly used command and you can search for a specific pattern inside of files. Below command will return the number of match with gzip string: grep -c gzip /etc/nginx/nf If you required only count of line matches, use -c ( -count) option with grep. 48: gzip on ĥ5: gzip_http_version 1.1 Count Matches # So if you want to print line number along with the output then you can use -n option: grep -n gzip /etc/nginx/nfīy running above command it will print below output. It’s very convenience to check in file by line number. If you want to ignore case when searching, use -i (or -ignore-case) option.įor example, /home/tecnstuff/test_file file have words nginx, nGinx, NginX and run below command: grep Unix /home/tecnstuff/test_fileĪbove command will not match and doesn’t show anything in output.īut if you execute grep command with -i option then it will match to the both uppercase and lowercase and return output. I need to grep large tab-separated 6 columns file (.bed file in fact) to split it by the content of the first column using the list of string. The problem looks simple and common, so Ive looked through many answers but seems that none of them provides appropriate general solution. So the uppercase and lowercase characters are considered as different. Make grep to exact match strings with and without dash '-'. It will match only those line which doesn’t contains the given word.įor example print all line that do not contain the word gnu: grep -v gnu /path/to/file Case Insensitive Search #īy default, the grep command is case sensitive. To print the invert of match you can use -v option with grep command. conf in current working directory and will print only the file names which contains the string. Use the -l ( or -files-with-matches) option with grep command: grep -l *.confĪbove command will search in all files ending with. When need to print only file name where search pattern match. It will force grep to match only whole word sweta: grep -w "sweta" file Show Only the Filename # You can get exact match using -w option along with grep command. For example, if you search for sweta user then grep will match with sweta123, test_sweta and more. When search any word by default grep will return all line wherever keyword is used. etc/nginx/sites-available/: server_name /etc/nginx/sites-enabled/: server_name Use grep to search exact words only # It will display the matching lines with path: /etc/hosts:127.0.0.1 etc/nginx/sites-available/: server_name If you would like to search in symbolic links then you can should use -R instead of -r option: grep -R /etc For example, search for string in all files inside the /etc directory: grep -r /etc /etc/hosts:127.0.0.1
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