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- #DEBIAN FIND WORD IN FILE AND REPLACE ALL INSTANCES HOW TO#
- #DEBIAN FIND WORD IN FILE AND REPLACE ALL INSTANCES UPDATE#
If you are looking for changing a single instance of your match string consider using lineinfile module. The Ansible REPLACE module will replace all the instances of a matching string in a file, while Line in file module replaces a single instance,
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There is one major difference between Ansible replace and Line in file. Ansible facilitates us with a dedicated module named as replace The working principle of this module is more like find and replace in your favourite editor and it also supports regular expressions. Join the nixCraft community via RSS Feed, Email Newsletter or follow on Twitter.This article is about “how to replace a line in file using ansible and seeing various other examples of ansible replace module”. He wrote more than 7k+ posts and helped numerous readers to master IT topics. Vivek Gite is the founder of nixCraft, the oldest running blog about Linux and open source. See BSD (used on macOS too) sed or GNU sed man page by typing the following man command/info command or help command:
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# you can add I option to GNU sed to case insensitive search # # you can change the delimiter to keep syntax simple # # find word1 and replace with word2 using sed # $ cat input.txt Recap and conclusion – Using sed to find and replace text in given files $ sed -i -e '/FOO/s/love/sick/' input.txt In this example only find word ‘love’ and replace it with ‘sick’ if line content a specific string such as FOO:
#DEBIAN FIND WORD IN FILE AND REPLACE ALL INSTANCES HOW TO#
How to use sed to match word and perform find and replace So I am going to use +:Ĭonsider using for all your needs. Sed command allows you to change the delimiter / to something else. Our syntax is correct but the / delimiter character is also part of word1 and word2 in above example. You will get an error that read as follows: sed: 1: "s/. $ gsed -i'.BAK' 's/foo/bar/g I' hello.txt Run the following command on Apple macOS (first set up home brew on macOS): Please note that the BSD implementation of sed (FreeBSD/OpenBSD/NetBSD/MacOS and co) does NOT support case-insensitive matching including file updates with the help of -i option. To match all cases of foo (foo, FOO, Foo, FoO) add I (capitalized I) option as follows: If you removed the /g only first occurrence is changed. find all occurrences of foo and replace with bar using sed.
#DEBIAN FIND WORD IN FILE AND REPLACE ALL INSTANCES UPDATE#
To update file pass the -i option when using GNU/sed version: Sample outputs: The is a test file created by nixCrft for demo purpose. I am going to use s/ for substitute the found expression foo with bar as follows: The is a test file created by nixCrft for demo purpose. Let us create a text file called hello.txt as follows: Examples that use sed to find and replace The above replace all occurrences of characters in word1 in the pattern space with the corresponding characters from word2. Sed -i -e 's/word1/word2/g' -e 's/xx/yy/g' input.file Sed 's/word1/word2/g' input.file > output.file