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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. 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 It tells sed to find all occurrences of ‘old-text’ and replace with ‘new-text’ in a file named input.txt.The s is the substitute command of sed for find and replace.sed -i 's/old-text/new-text/g' input.txt.The procedure to change the text in files under Linux/Unix using sed: These are often more complex to use than nano, but are also more powerful.Find and replace text within a file using sed command There are also quite a few other terminal-based editors available in Kubuntu, popular ones include VIM and Emacs (the pros and cons of each are cause for much friendly debate within the Linux community). When running it from the command line, always use the following command, which ensures that the editor will not introduce line breaks: nano -wįor more information about how to use nano, refer to the guide on the wiki. If you need to use a text editor from the command line, you can use nano, which is a simple to use text editor. K-menu-> Utilities-> Kate (Advanced Text Editor)įrom the command line using kdesu, as mostĬonfiguration files require root privileges to alter them. Through the graphical interface, you may occasionally have toĮditor, which can be launched by clicking Even though you most often can edit configurations All of the configurations and settings in Linux are saved in