Hackers invaded the Hyatt hotel on west campus this week for part of the Linux Plumbers Conference, an annual gathering of Linux kernel and infrastructure developers. Linus Torvalds, the creator of the open-source Linux operating system, is in town for the conference, which has been held in Portland, Oregon for the past two years. This year, the conference is at the Hyatt the west end of campus after several MIT alumni on the planning committee pushed for the conference to be held in Cambridge.