(There are many software for long-distance switch machine, but either the function is single, or the operation is inconvenient. And Lanhelper (LAN Helper) is a software of "people and little ghosts", it can automatically scan the local area network, and save the collected computer name, IP address and other information as a file, and the next operation only needs to open the reserved file, It can easily perform batch wake-up or shutdown tasks for remote computers.)