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![GNU sed cheat sheet GNU sed cheat sheet](https://opensource.com/sites/default/files/styles/medium/public/pictures/cheat_sheet_sed.jpg?itok=-OZSpHJv)
Sed is a Linux stream editor. It transforms text in an input stream, such as a file or pipe. Sed works on one line at a time. Because it has no visual display, it creates a pattern space, and once the pattern space is populated, your transformations are executed.
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