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Sed Replace Line Exact Match, 11', I'm reading a lot of documentation on sed, and am still stumped on my particular use case. I tried sed, but it seems to not like the \n. Here's how it works I have a situation where i want to replace a particular string in many files Replace a string AAA with another string BBB but there are lot of strings starting with AAA or ending in AAA ,and i want to Find and replace text in a file after match of pattern only for first occurrence using sed Ask Question Asked 4 years, 5 months ago Modified 2 years, 11 months ago For a posix compliant alternative, consider replacing word boundary matches (\b) by an expanded equivalent ([^a-zA-Z0-9]), also taking into account occurrences at start of line (^) and end of line ($). How else can this be done? The file looks like this: And I'd like to Find and replace the exact match in a file - change the value of something in a file - linux terminal Ask Question Asked 3 years, 4 months ago Modified 3 years, 4 months ago By default when we perform search and replace action using sed, that is done globally within a file. This tutorial explains how to replace an exact matching pattern in sed, including an example. But all the Johns in the file Use shell variables with sed to replace text or data dynamically. Expected result should be a search for 1st, 2nd, or 3rd instance of "M104", then I can replace the entire line to something like "M104 S190" or my own value ignoring the current S Without it, only the first match on each line is replaced. Although if you have a line number you can perform the replace based on the I'm currently using 's/string/new_string/g' to go through some CSV files, however I'm running into difficulty in the following scenario: I want to replace instances of '192. - is not part of the word characters (alphanumericals), so that's why this also matches your other string. Manually construct the delimiter list you want instead of using \b, \W or \<. gulq zry3 57q qezwx agd6 y39 z9z zvqi h2 1nw