![]() You have learned how to search for specific text in files on the Linux file system in this tutorial. grep -rlw -exclude-dir="*apache2*" -e "tecadmin" /var/log For instance, donât search for string files in any folder with apache2 in its name. You can also skip searching certain directories. The grep command is primarily used to search a text or file for lines that contain a match to the specified words/strings. grep -rlw -exclude="*.txt" -e "tecadmin" /var/log For example, you can exclude files with the. You can use the -exclude option in find to exclude some files that match certain file name criteria. grep -rlw -include="*.log" -e "Error" /var/log As grep commands are case sensitive, one of the most useful operators for grep searches is -i. log extension in the /var/log directory and its sub-directories. The following command searches for âErrorâ in files with the. You can search strings in files that match the file name criteria. grep -rlw -e "Error" -e "Warning" /var/log Search multiple string in all files with command line The example below will look for âErrorâ and âWarningâ in all the files in the /var/log directory and its subdirectories. The -e switch can also be utilized to find multiple strings. grep -rlw "Error" /var/log Search specific text in all files using command line The below example command will search the string âErrorâ in all files in /var/log directory and its sub-directories. You can also use the -w switch, which will tell grep that the string must match the whole line. To avoid this, and search for strictly apple, you can use this command: grep '' fruits.txt.Letâs discuss a few examples of searching a text/string in the file system. In our examples above, whenever we search our document for the string apple, grep also returns pineapple as part of the output. There are several ways to use the grep command to search text. -w, -word-regexp: force to match whole words.-e, -regexp=PATTERN: Use a pattern to search or specify multiple search strings.-i, -ignore-case: ignore case of search string Look at the above snapshot, command grep -v 9 marks.txt displays lines hwich dont. ![]()
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