In a look ahead at a week of Cambridge and Somerville events, there’s a Riverfest with fireworks, Gilman Square arts and music, Diane von Furstenburg talks, a pop-up serves Indonesian snacks and ...

Ubuntu is a free computer system, like Windows or macOS, but it’s built by a community. It’s great for programmers because it’s very flexible and has lots of tools already built-in that help you code.