Linux is, in simplest terms, an operating system. It is the software program on a laptop or computer that enables applications and the laptop or computer operator to access the devices on the laptop or computer to perform desired functions. The operating program (OS) relays instructions from an application to, for instance, the computer's processor. The processor performs the instructed task, then sends the results back to the application by way of the operating technique. My websites: How to Install a Huawei E220 Modem in Ubuntu Linux