tag/sed

Sed is really a great tool to filter & transform text — but the syntax is not always easy. Whether you’re a beginner or a more advanced user looking for a memory aid, this cheatsheet will help you remember the basic sed commands.

It is not uncommon to have to apply similar changes to a set of many different files. For example, a programmer might want to insert some license text on top of each source file of a project. Or one might want to update the copyright notice on all pages of a static website.

If you can go beyond the most basic use cases, the sed substitution command will give you a tremendous amount of power to process and transform your text files.

Converting a text to upper case? Well, that’s a simple question …​ with surprisingly subtle answers. Especially if you want to take into account internationalization issues…​ You’ve probably noticed from my accent (pun intended), I’m a French native speaker. And it is always a shock when I see a shell script or another piece of software that fails at handling accented letters or characters with diacritical marks…​