It is the most famous animal of Open Source World. Tux (also known as Tux the Penguin) is the official mascot of the Linux kernel.

The concept of the Linux mascot being a penguin came from Linus Torvalds, the creator of Linux. Tux was created by Larry Ewing in 1996 after an initial suggestion made by Alan Cox and further refined by Linus Torvalds on the Linux kernel mailing list . The first person to call the penguin "Tux" was James Hughes who said that it stood for "(T)orvalds (U)ni(X)".