If you need to output only lines before (or after) a unique line identified by a regular expression, then here are examples of using sed. All examples in this article can be found in github. Consider the following lines of content in the variable “$lines” $ echo “$lines” ape swings frog jumps logs dog barks … Bash: output all lines before/after line identified by regex
A common task when configuring software is modifying a properties file to set or override behavior. And although properties files are simple key=value pairs, there are some corner cases that make it challenging. For example, when setting a key/value pair, the key may be commented out with a hash mark in front of the line. … Bash: setting and replacing values in a properties file use sed
The sed utility is a powerful utility for doing text transformations. In this article, I will provide an example of how to insert a line before and after a match using sed, which is a common task for customizing configuration files. I have also written a related article on setting and replacing values in a … Linux: Using sed to insert lines before or after a match