![]() This will search for the string 'windows' in all files relative to the current directory and replace 'windows' with 'linux' for each occurrence of the string in each file.Īny comments / suggestions for improvement are much welcomed. Not that great of an example (you could just search files for that phone number instead of the string 'phonenumber'), but your imagination is probably better than mine.Įxample grep -rl 'windows'. Let’s try searching a text document for two different strings: grep -e Class 1 -e Todd Students. ![]() grep -n -w -e 'dfff' -e 'apple' test6.txt, In the second example, we used multiple grep commands and pipes to match lines containing both dfff and apple words in the file test6.txt. You can specify multiple patterns by using the -e switch. In the first example, we use the grep -e option to match the line containing the word dfff or apple in the file test6.txt. txt xargs grep -l word2 xargs grep -l word3. For example, maybe you have a lot of files and only want to only replace on files that have the matchstring of 'phonenumber' in them, and then replace '555-5555' with '555-1337'. You can also use grep to find multiple words or strings. Here is a quick run down on how you can use grep or egrep to match multiple strings. There may be times when you want to use grep to find only files that have some matchstring and then replace on a different string in the file than matchstring. String2 is the string that replace string1. ![]() So we have created ‘ 0-9’ this as a regular expression that will accept only numbers or digit. In the next line, we are using grep () function to identified the integers in the string. String1 would ideally be the same string as matchstring, as the matchstring in the grep command will pipe only files with matchstring in them to sed. First, we are creating a string that holds some integer value as well. Matchstring is the string you want to match, e.g., "football" The pipe delimiter might be useful when searching through a lot of html files if you didn't want to escape the forward slash, for instance. Note: The forward slash '/' delimiter in the sed argument could also be a different delimiter (such as the pipe '|' character).
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