Delve into the world of Einstein's theory of general relativity with Jeffrey O'Callaghan's captivating book, "Einstein's Explanation of the Unexplainable." Discover the historical context behind this groundbreaking theory and explore its profound implications for our understanding of the universe.... Read More

sed (short for stream editor) is a great tool to quickly and efficently edit text files, this article is a full tutorial of how to use sed from a beginner level to an advanced one, I believe that this article will show you some of the magic of sed command... Read More