Linus Benedict Torvalds (Swedish pronunciation: [ˈliːn.ɵs ˈtuːr.valds] ( listen); born December 28, 1969 in Helsinki, Finland) is a Finnish Americansoftware engineer and hacker, best known for having initiated the development of the open source Linux kernel. He later became the chief architect of the Linux kernel, and now acts as the project's coordinator. He also created the revision control system Git. He was honored (shared with Dr Shinya Yamanaka) with the 2012 Millennium Technology Prize by the Technology Academy Finland "in recognition of his creation of a new open source operating system for computers leading to the widely used Linux kernel".

Torvalds was born in Helsinki, Finland. He is the son of journalists Anna and Nils Torvalds, and the grandson of poet Ole Torvalds. Both of his parents were campus radicals at the University of Helsinki in the 1960s. His family belongs to the Swedish-speaking minority (5.5% of Finland's population). Torvalds was named after Linus Pauling, the American Nobel Prize-winning chemist, although in the book Rebel Code: Linux and the Open Source Revolution, Torvalds is quoted as saying, "I think I was named equally for Linus the Peanuts cartoon character", noting that this makes him half "Nobel-prize-winning chemist" and half "blanket-carrying cartoon character".