A long time ago, nearly every Linux newbie would encounter a classical problem—how to update the Linux system? What's the command used to update the Linux system? Because at that time there generally wasn’t graphics software like "Software Center" or "System Update" in the mainstream Linux systems, users could only use command to update the system. However, most Linux novices contacted with systems other than Windows for the first time, so they didn’t know how to use command to update the system. At present, it is the case that for most Linux systems, either the Software Center is installed in ...Read more